Dukewillington18 Dukewillington18
  • 25-01-2019
  • Mathematics
contestada

how do i calculate the probability of tossing a coin 20 times and getting heads twice?

Respuesta :

ktawesome26
ktawesome26 ktawesome26
  • 25-01-2019

Answer:

Probability of two heads or fewer is thus = (1 + 20 +190)/1048576 = 211/1048576 = .000201225….. or minuscule.

Step-by-step explanation:

Number of possible outcomes after flipping a fair coin 20 times = 2^20 = 1048576. Number of ways with 0 heads = 1. Number of ways with just 1 head = 20. Number of ways with 2 heads = (20)(19)/2! = 190.


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