Astudent flips a coin four times. what is the probability the coin lands tails up exactly three times?

the probability is
a
.

0.25

Step-by-step explanation:

Use binomial probability:

P = nCr pʳ qⁿ⁻ʳ

where n is the number of trials,

r is the number of successes,

p is the probability of success,

and q is the probability of failure (1−p).

P = ₄C₃ (0.5)³ (1−0.5)⁴⁻³

P = 4 (0.5)³ (0.5)

P = 0.25

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square

{3 + i, 3 - i, 3, -1}

step-by-step explanation: