Average

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Of the three numbers, the second is twice the first and thrice the third. If the average of the three numbers is 44, the largest number is....
24
no
72
yes
36
no
108
no
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The average age of 40 students of a class is 18 years. When 20 new students are admitted to the same class, the average age of the students of the class is increased by 6 months. The average age of newly admitted students is....
19 years
no
19 years 6 months
yes
20 years
no
20 years 6 months
no
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In a certain year, the average monthly income of a person was Rs 3400. For the first eight months of the year, his average monthly income was Rs 3160 and for the last five months, it was Rs 4120. His income in the eighth month of the year was....
Rs 3160
no
Rs 5080
yes
Rs 15520
no
Rs 5520
no
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If the average weight of 6 students is 50 kg; that of another 2 students is 51 kg; and that of another 2 students is 55 kg; then the average weight of all students is....
61 kg
no
51.5 kg
no
52 kg
no
51.2 kg
yes
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A cricketer had a certain average of runs for his 64 innings. In his 65th innings, he is bowled out for no score on his part. This brings down his average by 2 runs. His new average of runs is....
130
no
128
yes
70
no
68
no
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The average of 10 numbers is 7. If each number is multiplied by 12, then the average of the new set of numbers will be....
7
no
19
no
82
no
84
yes
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The average age of 30 students is 9 years. If the age of their teacher is included, the average age becomes 10 years. The age of the teacher (in years) is....
27
no
31
no
35
no
40
yes
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From a class of 24 boys, a boy, aged 10 years, leaves the class and in his place a new boy is admitted. As a result, the average age of the class is increased by 2 months. What is the age of the new boy?
12 years
no
15 years
no
14 years
yes
13 years
no
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The bowling average of a cricketer was 12.4. He improves his bowling average by 0.2 points when he takes 5 wickets for 26 runs in his last match. The number of wickets taken by him before the last match was....
125
no
150
no
175
yes
200
no
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The average of 30 numbers is 12. The average of the first 20 of them is 11 and that of the next 9 is 10. The last number is....
60
no
45
no
40
no
50
yes
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