3 years ago

30. The average age of 20 boys is 15.

Mathematics

2 answers:

Alex787 [66]3 years ago

6 0

Answer:

D. 300 years

Step-by-step explanation:

Mean = $\frac{sum of observations}{no. of observations\\}$

Here we know the mean which is 15 and the number which is 20

Total age = 15 × 20

Total Age = 300 years

Simora [160]3 years ago

4 0

Answer:

D. 300 Years is the correct answer.

Step by Step Explanation:

20×15= 300

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