Q. 14

# In a medical examination of 40 students of a class, the following blood, groups are recorded:

From this class, a student is chosen at random, What is the probability that the chosen student has blood group B?

A.

B.

C.

D.

Answer :

Total number students= 40

Number of students with blood group ‘A’ = 11

Number of students with blood group ‘B’ = 15

Number of students with blood group ‘AB’ = 9

Number of students with blood group ‘O’ = 5

Probability P() =

Probability of selecting a student with blood group ‘B’

P(B) = = =

Rate this question :

How useful is this solution?

We strive to provide quality solutions. Please rate us to serve you better.

PREVIOUS80 bulbs are selected at random from a lot and their lifetime is recorded in the from of a frequency table given below:A bulb is chosen at random from the lot. What is the probability that the bulb chosen has lifetime less than 900 hours?NEXTIn a group of 60 persons , 35 like coffee. Out of this group , If one person is chosen at random. What is the probability that he or she does not like coffee?

Related Videos

Champ Quiz | Basics of Probability36 mins

RD Sharma | IMP Qs Discussion on Probability43 mins

Quiz | Calculating Probability39 mins

NCERT | Critical Thinking Problems in Probability39 mins

RD Sharma | Extras on Probability45 mins

Concept of Probability36 mins

Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Expertsview all courses

Dedicated counsellor for each student

24X7 Doubt Resolution

Daily Report Card

Detailed Performance Evaluation