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HMMT 十一月 2016 · THM 赛 · 第 1 题

HMMT November 2016 — THM Round — Problem 1

专题
Contest Math / 竞赛数学
难度
L3
来源
HMMT

题目详情

英文原题

  1. De andre Jordan shoots free throws that are worth 1 point each. He makes 40% of his shots. If hetakes two shots find the probability that he scores at least 1 point.
解析

英文解析

  1. De andre Jordan shoots free throws that are worth 1 point each. He makes 40% of his shots. If hetakes two shots find the probability that he scores at least 1 point.
    Proposed by: Allen Liu
    Answer:16
    We want to find the probability of making at least one shot. The probability he makes no shots is 25
    ( ) ( )
    2 216
    3 3
    , so the probability of making at least one is 1 − = .
    5 5
    25