Question

6. The mean of 20 numbers is 20. If 2 is added to each of the first ten numbers, find the new mean mean of the new set of 20 numbers.​

Answer 1

Answer:

21

Your answer is "21"

Step-by-step explanation:

The mean of 20 no. is 20

hence sum of 20 no. will be = 20x20 = 400

if 2 is added to first 10 no. to total addition of 10x2 = 20

so after adding 20 to 400

total sum will be = 20+400-420

so avarege will be = 420/20 = 21