The probability of a person having a normal cholesterol level is 0.55, or 55%.
Voinea, Alexandra
Two reasons!
Voinea, Alexandra
Voinea, Alexandra
P(3 or 4 or 5) = P(3)+P(4)+P(5) = 0.252+0.192+0.134= 0.578P(3 or 4 or 5) = 1 - P(1 or 2) = 1 - (.186+.236) = 0.578The probability of the chosen student earning a 3 or better is 0.578
Voinea, Alexandra
Voinea, Alexandra
P(not 1) = P(2)+P(3)+P(4)+P(5) = .186+.252+.192+P(not 1) = 1 - P(2 or better) = 1 - (.186+.252+.192+.134) = 0.764The probability of the chosen student didn’t get a 1 is 0.764