Fifty percent of households say they would feel secure if th

Fifty percent of households say they would feel secure if they had $50,000 in savings. You randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings. Find the probability that the number that say they would feel secure is exactly five, more than five, and at most five. Find the probability that the number that say they would feel secure is exactly five. P(5)= (Round to three decimal places as needed).

Solution

a) 8C5(1/2)^5(1/2)^3=0.21875 ....Ans b)(8C6+8C7+8C8)/2^8 = 0.14453125 ....Ans C)(8C1+8C2+8C3+8C4)/2^8 = 0.6328125 .aNS PLSZ RATE ME 1ST