Hi,

Note: The probability of x successes in n trials is: 



P = nCx*  where p and q are the probabilities of success and failure respectively. 

In this case p & q are = 1/2 or .5

nCx =   4C3 = 4    4C4 = 1

P(x≥3)= P(3) + P(4) 

P(3)=  4*(.5)^3(.5) = .25 

P(4)= .5^4 = .0625 

P(x≥3)= .25 + .0625 = .3125

 

RELATED QUESTIONS

Assume the random variable X has a binomial distribution with the given probability of... (answered by ikleyn)

Assume the random variable X has a binomial distribution with the given probability of... (answered by ikleyn)

Assume the random variable X has a binomial distribution with the given probability of... (answered by MathLover1,math_tutor2020)


Assume the random variable X has a binomial distribution with the given probability of... (answered by Theo)

Assume the random variable X has a binomial distribution with the given probability of... (answered by ikleyn,ewatrrr)

Assume the random variable X has a binomial distribution with the given probability of... (answered by MathLover1)

A random variable follows a binomial distribution with a probability of success equal to... (answered by ewatrrr)

Assume that a procedure yields a binomial distribution n times. Use the binomial... (answered by oscargut)

Suppose X has a Binomial distribution with n trials, and a probability of success p. The... (answered by math_tutor2020)