Question

the average (arithmetic mean) of t and y is 15, and the average of w and x is 15. what is the average of t, w,x,and y

Answer 1

Oi :)

$\frac{t+y}{2}=15 \\ \\ t+y=15*2 \\ t+y=30$
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$\frac{w+x}{2}=15 \\ \\ w+x=15*2 \\ w+x=30$
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Logo:
$\frac{t+y+w+x}{4}=??? \\ \\ \frac{30+30}{4} \\ \\ \frac{60}{4} \\ \\ 15$
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Answer = 15

Boa Noite. Bons Estudos !