Average

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The average weight of nine mangoes increases by 20 g if one of them weighing 120 g is replaced by another. The weight of the new mango is....
180 g
no
200 g
no
260 g
no
300 g
yes
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The average age of 6 persons in a committee is increased by 2 years, when two men aged 55 years and 60 years are substituted by two women. The average age of these two women is....
127 years
no
103 years
no
63.5 years
yes
51.5 years
no
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The average of a collection of 18 measurements is calculated to be 46 cm. But later it is found that a mistake has occurred in one of the measurements which is recorded as 56 cm in place of 52 cm, then the correct average is....
43 cm
no
45.77 cm
yes
42 cm
no
44 cm
no
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The average temperature of first three days in a week is 24ºC and that of the next three days is 27ºC. If the average temperature of the whole week is 26.5ºC, what is the temperature of the last day of the week?
32ºC
no
31.50ºC
no
29ºC
no
32.50ºC
yes
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The sum of ages of Amar, Akbar and Anthony is 80 years. What was the total of their ages three years ago?
72 years
no
71 years
yes
70 years
no
77 years
no
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The average of X1, X2 and X3 is 14. Twice the sum of X2 and X3 is 30. What is the value of X1?
20
no
27
yes
16
no
12
no
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Out of three annual examinations, each with a total of 500 marks, a student secured average marks of 45% and 55% in the first and second annual examinations. To have an overall average of 60%, how many marks does the student need to secure in the third annual examination?
450
no
400
yes
350
no
300
no
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The average salary of 100 employees in an office is 16,000 per month. The management decided to raise salary of every employee by 5% but stopped a transport allowance of Rs 800 per month which was paid earlier to every employee. What will be the new average monthly salary?
Rs 16,000
yes
Rs 16,500
no
Rs 16,800
no
Cannot be known since data are insufficient
no
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In a one-day series against Pakistan, Sachin's average was 54 runs per match, Dravid's average was 57 runs per match and Ganguly's average was 37 runs per match in 5 matches. What was the average of the three players considered together per match?
130
no
148
yes
135
no
140
no
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The mean of 19 observations is 24. If the mean of the first 10 observations is 17 and that of the last 10 observations is 24, find the 10th observation.
65
no
37
no
46
yes
53
no
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