ACT 2021 June(D06) Math Question 25 Explanation - ACT Helper

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2021 June(D06) Math Question 25
Statistics
- Mean, Median
Choice B
$A v e r a g e w e i g h t_{(J u a n, J i m, M a l i k)} = \frac{J u a n + J i m + M a l i k}{3} = 160 p o u n d s$
$=> J u a n + J i m + M a l i k = 160 p o u n d s \times 3 = 480 p o u n d s$
$A v e r a g e w e i g h t_{(J u a n, J i m, M a l i k, H a r r y)} = \frac{J u a n + J i m + M a l i k + H a r r y}{4} = 150 p o u n d s$
$=> J u a n + J i m + M a l i k + H a r r y = 150 p o u n d s \times 4 = 600 p o u n d s$
$=> H a r r y = 600 p o u n d s - 480 p o u n d s = 120 p o u n d s$
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