NTA Abhyas JEE Main2020MathematicsProbabilityPractice
Let there are 4 sections of 25 students each in a coaching class. Now, out of 150 students 100 are to be selected randomly and enrolled in these sections. Then, the probability that the students A and B (both present in 150 students) are selected and placed in the same section, is
Options
- A10 13
- B16 149
- C2 33
- D5 149
Correct answer
B. 16 149
Step-by-step solution
Probability that A is selected = 100 150 = 2 3 Now, probability that B is in same section = 24 149 Then, the required probability = 2 3 × 24 149 = 16 149