Math, asked by sailajpoudel1, 19 days ago

the mean of 25 observations is 80 and the mean of another 55 of the relation is 60 find the mean of whole set of observation

Answers

Answered by Henrycavill

0

Answer:

mean of whole set = (80+60)/2

= 140/2 = 70

Answered by RaihanEP

0

Answer:

662.5

Step-by-step explanation:

25 × 80 = 2000

55 × 60 = 3300

2000 + 3300 = 5300

We have total 25 + 55 = 80 numbers

5300 ÷ 80

= 662.5

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