Answer to Question #247767 in Statistics and Probability for Wechetings

Question

The IB grades attained by a group of students are listed as follows. 6, 4, 5, 3, 7, 3, 5, 4, 2, 5.

find the probability that a student chosen at random from the group scored at least a grade 4.

Answer 1

Solution:

Favorable outcomes = {6,4,5,7,5,4,5}

No. of favorable outcomes = 7

Total no. of outcomes = 10

Required probability = 7/10