Q. 115.0( 1 Vote )

An unbiased coin

Answer :

Given:

n=4

p(getting atleast one head)=?

• 0 head : HHHH

• 1 head : HTTT

THTT

TTHT

TTTH

• 2 heads :HHTT

HTHT

HTTH

THHT

THTH

TTHH

• 3 heads: HHHT

HHTH

HTHH

THHH

• 4 heads : HHHH

Total outcomes = 16

Outcomes containing at least 1 head = 15

P(getting at least 1 head)=

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