Coin Tossed

Probability Level 2

A fair coin is tossed s i x six times. The probability of obtaining 4 4 or more heads is __________ \text{\_\_\_\_\_\_\_\_\_\_} .

21 32 \frac{21}{32} 15 64 \frac{15}{64} 11 32 \frac{11}{32} 7 64 \frac7{64}

View wiki
A Former Brilliant Member by A Former Brilliant Member

This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try refreshing the page, (b) enabling javascript if it is disabled on your browser and, finally, (c) loading the non-javascript version of this page . We're sorry about the hassle.

1 solution

First, we search whole proballity, it's 2^6

Then since it must HHHHBB (Head and Back) or HHHHHB or HHHHHH then just do

6C4 = 15 6C5 = 6 6C6 = 1

15+6+1 = 22

Prob = 22/64 = 11/32

0 Helpful 0 Interesting 0 Brilliant 0 Confused

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...