Math, asked by himani1032006, 4 months ago

mean of 10 observation is 15 and 20 observation is 24 find the mean of 30 observation

Answers

Answered by yusra29

1

Sum of 10 numbers= 10×15= 150

sum of 20 numbers= 20×24= 480

sum of 30 numbers= 150 +480= 630

mean of 30 numbers= 630÷30= 21

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