Question

arithmetic mean of these atom 10 15 x 20 30 is 20 find out the missing item​

Answer 1

Answer:

hello

here is your answer

mean = 10+15+20+30+x/5

20×5=75+x

100 - 75 = x

25 = x

hope you like it

Answer 2

The missing item or number in the data set or series is 25.

Explanation:

In Statistics,arithmetic mean or average is calculated as the sum of all the numbers or observations in a series or data set divided by the total number of items or observations in the series or data set.

In this case,the numbers or observations in the series are 10,15,x,20 and 30 and the arithmetic mean or average is 20.

Therefore,based on the formula of arithmetic mean or average,we can state:-

$(10+15+x+20+30)/5=20$

$75+x=100$

$x=100-75$

$x=25$

Therefore,the missing item or number in the given series or distribution is 25.