Quantitative Techniques Questions for Practice on Averages
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Quantitative Techniques Questions for Practice on AveragesThe average weight of 35 employees of an office is 65 kg. A new employee joined and the average weight increased by 1 kg. What is weight of the new employee?A food truck makes a profit of Rs. 60000, Rs.50000 and Rs. 80000 in the first three months of 2020. How much profit he must make in the month of April so that the average profit is Rs. 80,000 for four months?The 10 teenagers of the family on an average use their phones for 10 hours a day, and the 6 adults of the same family use their phones for 11 hours day. Find the average time each member of the family spends on the phone?The average of 7 observations was 343 but it was later found that an observation was taken as 60 instead of 80. Find the new correct average.The average run rate in first 30 overs in a cricket match was 5 runs per over. What should be the average run rate in the next 20 overs to achieve the score of 300 runs?The average salary of Reeta, Meeta and Geeta is Rs. 45000 each. If Reeta and Geeta earn equal and Meeta earns half of their individual salary. Calculate the salary of Meeta.The average age of Sunny and Bunty 5 years ago was 32 years. Sunny is twice the age of Bunty. Find Sunny’s present age.Anjali scored 75 marks as an average of 4 subjects. How much marks she must get to make the average of all the 5 subjects as 80?On an average 200 people visit the food court on each day from Monday to Friday and 325 people on the other days of the week. Find the average number of people who visted the food court in 2 weeks? DO IT YOURSELF!!!!The average of a, b and c is 60. If c is as less than the average as b is more than the average. Calculate a, b and c.SOLUTIONSTotal weight of 35 employees = 35*65 = 2275 kgLet the weight of new employee be xTotal weight of 36 employees = 2275 + x kgAs per the question(2275+x)/36 = 66x = 101 kg Let the profit to be earned in April be Rs. XAs per the question, (60,000+50,000+80000+x)/ 4 = 80,000190000+x = 320000x = Rs. 1, 30,000 Average time each member of the family spends on the phone =[(10*10) + (6*11)]/ 16 = (100+66)/16 = 166/16 = 10.3 hours Average of sever observations = 343Difference between correct and incorrect observation = 80-60 = 2020 will be divided equally over 7 observations = 2.8Therefore, new average = 343+2.8 = 345.8 Run scored in first 30 overs = 5*30 = 150 runsRuns still to make = 300- 150 = 150 runsOvers left = 20Average run rate for last 20 overs = 150/20 = 7.5 runs per over Let salary of Reeta, Meeta and Geeta be x, y and z respectivelyAs per the question(x+y+z)/3 = 45000x+y+z = 135000Also, it is given that,x = z andy = x/2Therefore,x + x/2 + x = 1350002x+ x/2 = 135000x = Rs. 54000Salary of Meeta = y = 54000/2 = Rs. 27000 Let the present age of Sunny and Bunty be x years and y years respectively.As per the question,[(x-5) + (y-5)]/2 = 32x+y = 74 yearsAt present, Sunny is twice the age of Buntyy = x/2x +x/2 = 74x = 49.3 years Let the marks of the fifth subject be xAs per the question(300+x)/ 5 = 80300+x = 400X = 100 In two weeks,People who visited food court from Monday to Friday = 200*10 = 2000People who visited food court on Saturday and Sunday = 325* 4 = 1300Average number of people who visited the food court in 2 weeks = (2000+1300)/ 14 = 3300/4 =236 persons (approx.) (function( $ ) {
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YY = YY.replace(currencies[i], '');
}
if (!isNaN(XX) && !isNaN(YY)){
var floatXX = parseFloat(XX);
var floatYY = parseFloat(YY);
return -(floatYY-floatXX) * ordBy;
} else if (!isNaN(XX) && isNaN(YY)){
return -1 * ordBy;
} else if (isNaN(XX) && !isNaN(YY)){
return ordBy;
} else {
if(X < Y) {
return -1 * ordBy;
}
if(X > Y) {
return 1 * ordBy;
}
return 0;
}
});
$.each(rows, function(index, row) {
node.children('tbody').append(row);
});
}
function removeTableCellDecoration() {
$("td[data-sorting], th[data-sorting]").removeClass('sortDecorator');
}
//unbind the click event just in case we are loading more than one document
$("td[data-sorting], th[data-sorting]").off('click');
$("td[data-sorting], th[data-sorting]").click(function(){
removeTableCellDecoration();
$(this).addClass('sortDecorator');
//get desired ordering
var ordering = $(this).attr('data-sortOrdering');
if (ordering == 'ASC'){
var ordBy = -1;
$(this).attr('data-sortOrdering', 'DESC');
} else {
var ordBy = 1;
$(this).attr('data-sortOrdering', 'ASC');
}
var cellPosition = $(this).prevAll().length;
var table = $(this).parents('table:first');
sortingTable(table, cellPosition, ordBy);
});
function convert2number(str) {
str = str.trim();
if (str.match(/^\d+/)) {
//we have to take special care when the thousand separators are '.'
var result_0 = str.replace(/\./g, '_@_');
var result_1 = result_0.replace(window.numFormat[0], '.');
var result = result_1.replace(/_@_/g, '');
result .replace(/ /g, '');
return result;
} else {
return str;
}
}
}(jQuery));
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Aditya Anand
Contributing author
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