Three coins are tossed. Find the probability of at least 2 tails ?

Three coins are tossed. Find the probability of at least 2 tails ?

Answer/Solution

1/2

Steps/Work

n(s) = 2^3 = 8
let E is the event of getting at least 2 tails
n(E) = TTT, TTH , HTT, THT = 4
P(E) = n(E) / n(s)
= 4/8
= 1/2
Ans- A

Probability Calculator / Auto Solver

Three coins are tossed. Find the probability of at least tails?

Calculated Answer

0.5

Step by Step Solution

In order to solve problem, you must evaluate n₀ / 2^n₀.

n₀ =	2

n₀ / 2^n₀
Evaluate 2^n₀ = 4
n₀ / 4
Evaluate n₀ / 4 = 0.5
0.5
The answer to the problem and the result of n₀ / 2^n₀ is 0.5