Question

You spin a spinner, and the probability that the spinner will land on red is 18%. Suppose you spin the spinner 4 times. What is the probability that the spinner will land on red at least 2 times? Round to the nearest tenth, if necessary

Answer 1

10.1%
11.9%
24.3%
63.8%

Answer 2

ok lets do this

Answer 3

The can be solved by using the binomial distribution:
\[P(2\ red)=\left(\begin{matrix}4 \\ 2\end{matrix}\right)0.18^{2}\times 0.82^{2}=0.1307\]
\[P(3\ red)=\left(\begin{matrix}4 \\ 3\end{matrix}\right)0.18^{3}\times 0.82^{1}=0.0191\]
\[P(4\ red)=\left(\begin{matrix}4 \\ 4\end{matrix}\right)0.18^{4}\times 0.82^{0}=0.00105\]
Adding the above three values of probability will give the required value.

Answer 4

add which one ?

Answer 5

Required probability is
0.1307 + 0.0191 + 0.00105 = ?

Answer 6

@kropot72 0.15

Answer 7

BTW none of the answer choices that you posted is correct.

Answer 8

that's what it says im not sure

Answer 9

The probability as a percentage is 15.1% rounded to the nearest tenth.