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NDA Math Statistics

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DIRECTIONS (Qs. 61-63) : Read the following information and answer the three items that follow:

Marks	Number of students
Marks	Physics	Mathematics
10 - 20	8	10
20 - 30	11	21
30 - 40	30	38
40 - 50	26	15
50 - 60	15	10
60 - 70	10	6

[NDA-I 2020]

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Question : 6

Total: 100

What is the mean of marks in Physics?

38.4
39.4
40.9
41.6

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