Question

A student guesses the answers to 6 questions on a true-false quiz. Find the probability that the indicated number of guesses are correct: at least 3.

Answer 1

Here: n=6 , p=1/2

Answer 2

So, u need to find P(x>=3)

Answer 3

can u?

Answer 4

@Rainbow_Dash ???

Answer 5

okay sure

Answer 6

so p = .5, so \[.5 \ge 3\], 3/.5 =6

Answer 7

P(x>=3)=P(x=3) + P(x=4)+P(x=6)