CAT Exam Category

the probablity that a student passes a physics test is 2/3 and the probabality that he passes both physics and english test is 14/35.the probablity that he passes atleast one test is 4/5.what is the probablity that the student passes the english test?

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P(A)=2/3 , P(B)=X , P(AuB)=4/5 , P(AnB)=14/35
P(AuB)=P(A)+P(B)-P(AnB)
P(B) = 56/105
9 years agoHelpfull: Yes(2) No(0)

56/105 probability
9 years agoHelpfull: Yes(1) No(0)

CAT Other Question

Sonu gets a jewellery made of alloy of copper and silver. The alloy with a weight of 8kg contains p percent of copper. What piece of a copper-silver alloy containing 40% of silver must be alloyed with the first piece in order to obtain a new alloy with the minimum percentage of a copper if the weight of the second piece is 2Kg? in a class 30% of the student offered english ,20% offered hindi and 10% offered both.if a student is select at random,What is the probablity that he has offered english or hindi?