Question 3735 – Engineering-Mathematics
December 6, 2023Question 4799 – Engineering-Mathematics
December 6, 2023Question 3657 – Engineering-Mathematics
There are three cards in a box. Both sides of one card are black, both sides of one card are red, and the third card has one black side and one red side. We pick a card at random and observe only one side.
What is the probability that the opposite side is the same colour as the one side we observed?
Correct Answer: B
Question 821 Explanation:
Given data,
— 3 cards in a box
— 1 st card: Both sides of one card is black. The card having 2 sides. We can write it as BB.
— 2 nd card: Both sides of one card is red. The card having 2 sides. We can write it as RR.
— 3rd card: one black side and one red side. We can write it as BR.
Step-1: The probability that the opposite side is the same colour as the one side we observed is 2⁄3 because total number of cards are 3
— 3 cards in a box
— 1 st card: Both sides of one card is black. The card having 2 sides. We can write it as BB.
— 2 nd card: Both sides of one card is red. The card having 2 sides. We can write it as RR.
— 3rd card: one black side and one red side. We can write it as BR.
Step-1: The probability that the opposite side is the same colour as the one side we observed is 2⁄3 because total number of cards are 3
3/4
2/3
1/2
1⁄3
Subscribe
Login
0 Comments