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Answer:
7.6 years.
Step-by-step explanation:
Each age has a specific frequency. Find the sum by multiplying each age by the frequency then adding each together:
Age 6 has a frequency of 1. 6(1) = 6.
Age 7 has a frequency of 4. 7(4) = 28.
Age 8 has a frequency of 3. 8(3) = 24.
Age 9 has a frequency of 2. 9(2) = 18.
Add up all of these values to find the sum:
6 + 28 + 24 + 18 = 76.
Find the mean (the average of all ages): sum / # of ages given
76 / 10 = 7.6 years.
