Mathematics-Statistics (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 7 - 8 of 8

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Question number: 7

» Mathematics » Statistics

MCQ▾

Question

The combined mean of three groups is 12 and the combined mean of first two groups is 3. If the first, second and third groups have 2, 3 and 5 items respectively, then mean of third group is

Choices

Choice (4) Response

a.

10

b.

18

c.

12

d.

21

Question number: 8

» Mathematics » Statistics

MCQ▾

Question

If the values 1,12,13,14,15,...,1n occurs at frequencies 1, 2, 3, 4, 5, 6…. . n respectively in a frequency distribution, then the mean is

Choices

Choice (4) Response

a.

1n

b.

1

c.

n

d.

2n+1

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