CUET Mathematics - A coin is tossed K times. If the probability of getting 3 heads is equal to the probability of getting 7 heads, then the probability of getting 8 tails is : | PYQs + Solutions

CUET Mathematics

Algebra

Medium

applied

$\frac{5}{512}$

$\frac{45}{2^{21}}$

$\frac{45}{1024}$

$\frac{210}{2^{21}}$

✅ Correct Option: 3

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If a random variable $X$ has the following probability distribution:

X	0	1	2	3	4
P(X)	k	2k	3k	k²	6k²

, then

Match List-I with List-II

List-I	List-II
(A) k	(I) 3/7
(B) $P(X < 2)$	(II) 6/49
(C) $P(X > 3)$	(III) 1/7
(D) $P(2 \leq X \leq 3)$	(IV) 22/49

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