Math, asked by chavhanswapnil500, 8 months ago

suppose arithmetic mean of 20 observation is 120.find arithmetic mean if each observation bid doubled and then increased by 5.

Answers

Answered by minarlive0211

0

answer: 245

Step-by-step explanation:

total sum of 20 observation is 120*20=2400

new sum is 2400*2+20*5= 4900

new mean = 4900/20. = 245

OR

LET EACH observation be 120

acc to question double it i.e 240 add 5 now it becomes 245

each of 20 no will be same

hense mean is 245

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