Mathematics · 2026
JEE Main · 6 April 2026, Shift 1 · Q10
A bag contains ( N +1) coins - N fair coins, and one coin with 'Head' on both sides. A coin is selected at random and tossed. If the probability of…
A bag contains $\displaystyle (\mathrm{N}+1)$ coins - N fair coins, and one coin with 'Head' on both sides. A coin is selected at random and tossed. If the probability of getting 'Head' is $\displaystyle \frac{9}{16}$, then N is equal to:
Official answer
From NTA’s final answer key for this paper.
(2)
$\displaystyle 7$
More from Probability
- A candidate has to go to the examination centre to appear in an examination. The candidate uses only one…2026
- The probabilities that players A and B of a team are selected for the captaincy for a tournament are 0.6 and…2026
- A man throws a fair coin repeatedly. He gets 10 points for each head he throws and 5 points for each tail he…2026
- A letter is known to have arrived by post either from KANPUR or from ANANTPUR. On the envelope just two…2026
- A bag contains 6 blue and 6 green balls. Pairs of balls are drawn without replacement until the bag is empty.…2026
- Let a, b, c ∈{1,2,3,4}. If the probability, that a x^2+2 √2 b x+c>0 for all x ∈ R, is m/n, gcd(m, n)=1, then…2026
- A coin is tossed 8 times. If the probability that exactly 4 heads appear in the first six tosses and exactly…2026
- From a month of 31 days, 3 different dates are selected at random. If the probability that these dates are in…2026
JEE Main 2026 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.