# Ex 15.1, 13 - Chapter 15 Class 9 Probability (Term 2)

Last updated at May 14, 2018 by Teachoo

Last updated at May 14, 2018 by Teachoo

Transcript

Ex 15.1, 13 In Q.1, Exercise 14.2, you were asked to prepare a frequency distribution table regarding the blood groups of 30 students of a class. Use this table to determine the probability that a student of this class, selected at random, has blood group AB. Total number of students = 30 Number of students with Blood group AB = 2 Probability = (๐๐ข๐๐๐๐ ๐๐ ๐ ๐ก๐ข๐๐๐๐ก๐ ๐ค๐๐กโ ๐๐๐๐๐ ๐๐๐๐ข๐ ๐ด๐ต)/(๐๐๐ก๐๐ ๐๐ข๐๐๐๐ ๐๐ ๐ ๐ก๐ข๐๐๐๐ก๐ ) = 3/30 = 1/10

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