Grades of 20 students is given below. The probability of getting grade "B" is

33.33%

No worries! We‘ve got your back. Try BYJU‘S free classes today!

30%

No worries! We‘ve got your back. Try BYJU‘S free classes today!

40%

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is C 40%
Total number of students = 20

From the given table, we observe:

Number of students who got grade "B" = 8

$Probability = \frac{N u m b e r o f f a v o r a b l e o u t c o m e s}{T o t a l n u m b e r o f o u t c o m e s}$

So,
Number of favorable outcome = 8
Total number of outcome = 20

$∴ Proability of getting grade"B" is = \frac{8}{20}$
= 0.4 = 40%

Hence, the probability of getting grade "B" is 40%.

Suggest Corrections

Similar questions

Q. X is taking up subjects - Mathematics, Physics and Chemistry in the examination. His probabilities of getting grade A in these subjects are 0.2, 0.3 and 0.5 respectively. Find the probability that he gets
(i) Grade A in all subjects
(ii) Grade A in no subject
(iii) Grade A in two subjects.

Q. The probability of a student getting grade A, B, C and D are 0.2, 0.3, 0.15 and 0.35 respectively, Then the probability that the student gets at least C grade is:

Q. The favorite fruits of grade 5 and grade 6 students are given below. The total number of students in each grade is 40.

Find how many more students in grade 5 like berries than in grade 4.

The probabilities of a student getting grade A,B,C AND D are0.2,0.3,0.15,0.35 respectively. then the probability that a student gets at least C grade is

a)0.65 b)0.15 c)0.50 d)0.35

Q. The number of students from grade 1 to grade 8 in a school is given. What is the range of the number of students across all the 8 grades?

Join BYJU'S Learning Program