Test SeriesFree PYQsExamsPricing

JEE Main Mathematics question

MathematicsPermutations and CombinationsJEE Main

A person is permitted to select at least one and at most coins from a collection of (distinct) coins. If the total number of ways in which he can select coins is , then equals

Answer: (A)

Solution

The number of selections is , which is half of

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-020615