Beliebt >

A fair coin is flipped four times. Use a tree diagram to find the probability of observing genauly two heads.Enter your answer as a percentage, to the nearest percent.

Lösung

A fair coin is flipped four times. Use a tree diagram to find the probability of observing exactly two heads.Enter your answer as a percentage, to the nearest percent.

Lösung

\frac{3}{8}

Schritte zur Lösung

The possible outcomes when a coin is thrown four times are

2 \cdot 2 \cdot 2 \cdot 2

Therefore, the number of possible outcomes:

2^{4}

Find the number of favorable outcomes of observing exactly 2 heads.:

6

Probability

= \frac{number of favorable outcomes}{total number of outcomes}

= \frac{6}{2 ^{4}}

\frac{6}{2 ^{4}} = \frac{3}{8}

= \frac{3}{8}

Beliebte Beispiele

find which term in the number pattern equals 451 the pattern increases by 7 The quotient of a number and-3.5 is 15.5 . Find the number.The differenz between three times a number and two more than two times the number aldo deposited 7000 into an account with an 11% interest rate compounded semiannually. How long will it take for the investment to grow to 40964 The radius of a kreis is 17 ft. Find its area in terms of pipi.