Question

.of a set of 30 numbers average of first 10 numbers =average of last 20 numbers then the sum of the last 20 numbers is? a)sum of first ten numbers b)2* sum of first ten numbers c)cannot be determined d)4* sum of last ten numbers; .of a set of 30 numbers average of first 10 numbers =average of last 20 numbers then the sum of the last 20 numbers is? a)sum of first ten numbers b)2* sum of first ten numbers c)cannot be determined d)4* sum of last ten numbers

Answer 1

Answer:

Step-by-step explanation:

Average of first 10 = average of last 20

But average = sum/number

So (Sum of first 10) / 10 = (sum of last 20) / 20

So sum of last 20 = 2 X sum if first 10