Question

the mean age of 12 boys is 10 years.it is found that the age of one boy is taken 14 years in place of 12 years.find the correct mean​

Answer 1

Answer:

Step-by-step explanation:

Given mean = 10

no. of boys = 12

sum of years = 12 * 10

= 120

wrong age = 14

to be  corrected with 12

so correct sum of years = 120 - 14 + 12 = 118

correct mean = sum of years / no of boys = 118 / 12 = 9.833

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Answer 2

Answer:

Step-by-step explanation:

the answer is

given mean = 10

no of boys =12

sum of years = 12 x 10 = 120  

wrong age =  14

to be corrected = 12

correct mean = sum of years / no of boys = 118 / 12 = 9.8333