[محمد الداود]

a box contain 24 transistors , 4 of which are defective . if 4 are sold at random , find the following probabilities

ومنهاااا
a. exatly 2 are defective
و..
b. none is defective

ماااا فهمت كيييف جاااب البسسسط ؟؟ موجودة بملخص أشررف ch4 ص44