• 25. The average weight of Juan, Jim, and Malik is exactly 160 pounds. The average weight of Juan, Jim, Malik, and Harry is exactly 150 pounds. How many pounds does Harry weigh?
    Choice B

    $$Average\ weight_{(Juan,\ Jim,\ Malik)}=\frac{Juan+Jim+Malik}{3}=160\ pounds$$

    $$=>Juan+Jim+Malik=160\ pounds \times3=480\ pounds$$

    $$Average\ weight_{(Juan,\ Jim,\ Malik,\ Harry)}=\frac{Juan+Jim+Malik+Harry}{4}=150\ pounds$$

    $$=>Juan+Jim+Malik+Harry=150\ pounds \times4=600\ pounds$$

    $$=>Harry=600\ pounds-480\ pounds=120 \ pounds$$