If the average of six numbers is 10 and each number is multiplied by 3, what is the new average?

We are given:

Average of 6 numbers = 10

So, total sum = 10 × 6 = 60

If each number is multiplied by 3, then the new total becomes:

New total = 60 × 3 = 180

Number of values = still 6

New average = 180 ÷ 6 = 30