Ruben owns a restaurant. He likes to keep track of everything customers are buying. His top 3 sellers are sandwiches, salads, and pizza. He knows that 1/3 of his customers buy a sandwich, 1/2 buy a salad, and 1/4 buy a pizza.
What fraction of customers buy one of his top 3 sellers?

Correct answer:

p =  3/4

Step-by-step explanation:

a=310.3333 b=21=0.5 c=41=0.25  P(A  B  C) = P(A) + P(B) + P(C)  P(A  B)  P(A  C)  P(B  C) + P(A  B  C)  p1=a+b+c=31+21+41=124+126+123=124+6+3=1213=11211.0833 p2=a b+b c+c a=31 21+21 41+41 31=83=0.375 p3=a b c=31 21 41=2410.0417  p=p1p2+p3=121383+241=2426249+241=24269+1=2418=43=0.75

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