Average of first five odd multiples of 3 is -

Question

Average of first five odd multiples of 3 is -

Options:

A . 12

B . 16

C . 15

D . 21

Answer: Option C

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Question 1. The average of 50 numbers is 38. If two numbers, namely 45 and 55 are discarded, the average of the remaining numbers is....are discarded, the average of the remaining numbers is ?

Question 2. The average of a collection of 20 measurements was calculated to tb 56 cm. But later it was found that a mistake had occ....have been 61 cm. The correct average must be -

Question 3. A cricketer whose bowling average is 24.85 runs per wickets, takes 5 wickets for 52 runs in next inning and thereby decr....wickets taken by him till the last match was :

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Question 5. A library has an average number of 510 visitors on sunday and 240 on other days. The average number of visitors per day ....a month of 30 day beginning with sunday is -

Question 6. There are two groups A and B of a class, consisting of 42 and 28 students respectively. If the average weight of group A....40 kg, find the average weight of the whole class.

Question 7. The average of x numbers is y2 and the average of y numbers is x2. So, the average of all the numbers taken together is ....the average of all the numbers taken together is :

Question 8. The arithmetic mean of the following numbers : 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6 and 7, 7, 7....and 7, 7, 7, 7, 7, 7, 7 is -

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