43. A card is drawn at random from normal
pack of cards. The probability that it is
either a spade and B or a queen is
...
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Step-by-step explanation:
no. of cards =52
no. of spades = 13
no. of queens = 4
probability of drawing a spade
p(s) = 13c1 / 52c1 =13/52=1/4
probability of drawing a queen
p(q) = 4c1/52c1=4/52=1/13
probability of drawing spade and queen
p(s and q)=1/52
probability of drawing a spade or a queen
both are not independent events so
= p(s) + p(q) - p(s and q)
=1/4 +1/13-1/52 = (17-1)/(13×4) = 16/ 13×4 = 4/13
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