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14.Probability
easy
A card is drawn from a pack of $52$ cards. A gambler bets that it is a spade or an ace. What are the odds against his winning this bet
A
$17:52$
B
$52:17$
C
$9:4$
D
$5:8$
Solution
(c) Probability of the card being a spade or an ace $ = \frac{{16}}{{52}} = \frac{4}{{13}}$.
Hence odds in favour is $4:9.$
So the odds against his winning is $9\,\,:\,\,4$.
Standard 11
Mathematics