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One card is drawn at random from a pa...

One card is drawn at random from a pack of playing cards the probability that it is an ace or black king or the queen of the heart will be

A

` ( 3 ) /( 52 ) `

B

` ( 7 ) /( 52 ) `

C

` ( 6 ) /( 52 ) `

D

` ( 1 ) /( 52) `

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The correct Answer is:
B
` therefore ` Required probability ` = ( ""^ 4 C _ 1 + ""^ 2C_ 1 + ""^ 1 C _ 1 ) /( ""^ 52 C _ 1 ) `
` = ( 4 + 2 + 1 ) /(52 ) = ( 7 ) /( 52 ) `
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