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AP EAMCET202022 Sep 2020Evening ShiftMathematicsProbabilityActual

When six coins are tossed simultaneously, the probability of getting at least 4 heads is

Options

  1. A11 64
  2. B15 64
  3. C11 32
  4. D15 32

Correct answer

C. 11 32

Step-by-step solution

Total possible chances =2^6=64 Required probability gathered =P( Getting 4 Heads )+P( Getting 5 Heads ) TTHHHH THHHHH +P( Getting 6 Heads ) gathered Нннннн aligned & = 6 ! 2 ! 4 ! + 6 ! 64 ! 5 ! + 6 ! 6 ! 64 = 15 64 + 6 64 + 1 64 & = 22 64 = 11 32 aligned Hence, option (3) is correct.

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