Question

If ∑fixi = 1860 and ∑fi = 30, then mean =
A) 60
B) 61
C) 62
D) 63
11.Range of first ‘n’ natural numbers is
A) n
B) n – 1
C) n + 1
D) n + 2
12.The median of first eight prime numbers is
A) 7
B) 9
C) 11
D) 13
13.The deviation of 47.5 from 17.5 is
A) 0
B) 0.5
C) 30
D) –30
14.The mean of first n odd natural numbers is n281, then n =
A) 81
B) 18
C) 27
D) 54
15.If the mean of 4, x, 6, 9, y and 13 is 8, then
A) x + y = 16
B) x – y = 16
C) xy = 16
D) x + y = 8
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Answer 1

Answer:

10. c.62

11 .A. n

Step-by-step explanation:

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