Home
Class 9
MATHS
Given below are the marks scored by a gr...

Given below are the marks scored by a group of 90 students in a Mathematics test of 100 marks.

Find the probability that a student obtained :
(i) less than `20%` marks .
(ii) `60` or more marks .

A

`{:(i,ii),(17//90,43//90):}`

B

`{:(i,ii),(7//90,43//90):}`

C

`{:(i,ii),(7//90,23//90):}`

D

`{:(i,ii),(17//90,23//90):}`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • IMO QUESTION PAPER 2016 SET B

    SCIENCE OLYMPIAD FOUNDATION |Exercise Everyday mathematics|10 Videos

  • IMO QUESTION PAPER 2016 SET B

    SCIENCE OLYMPIAD FOUNDATION |Exercise Achievers section|5 Videos

  • IMO QUESTION PAPER 2016 SET A

    SCIENCE OLYMPIAD FOUNDATION |Exercise Achievers Section|5 Videos

  • IMO QUESTION PAPER 2017 SET B

    SCIENCE OLYMPIAD FOUNDATION |Exercise ACHIEVERS SECTION|5 Videos

Similar Questions

Explore conceptually related problems

Find the probability that a student obtained marks 60 or above.

The table given below shows the marks obtained by 80 students of a class in a test with maximum marks 100 . A student of the class is selected at random . Find the probability that he gets (i) less than 15% marks , (ii) 60 or more marks and (iii) less than 45 marks .

The percentage of marks obtained by a student in a monthly test is as follows: What is the probability that the student gets more than 75% marks in a test?

The marks obtained by 90 students of a school in mathematics out of 100 are given as under : From these students , a student is chosen at random . What is the probability that the chosen student (i) gets 20% or less marks ? (ii) gets 60% or more marks ?

Following table shows the marks scored by a group of 90 students in a mathematics test of 100 marks. Marks 0-20 20-30 30-40 40-50 50-60 60-70 70-100 No. of Students: 7 10 10 20 20 15 8 Find the probability that marks scored by a student in the class is: at most 60 marks (ii) at least 60 marks (iii)not more than 50 marks

The following table shows the marks of 90 students in a test of 80 marks : The percentage of students who have obtained less than or equal to 50% marks is

A teacher wanted to analysis the performance of two sections of students in a mathematics test of 100 marks. Looking performance, she found that a few students got under 20 marks and a few got 70 marks or above. So she decided to group them into intervals of varying sizes as follows : 0-20, 20-30, ....., 60-70, 70-100. Then she formed the following table : |{:("Marks"," Number of students"),(0-20," 7"),(20-30," 10"),(30-40," 10"),(40-50," 20"),(50-60," 20"),(60-70," 15"),(70-"above"," 8"),("Total"," 90"):}| (i) Find the probability that a student obtained less than 20% in the mathematics test. (ii) Find the probability that a student obtained marks 60 or above .

The given table shows the marks obtained by 80 students in a class test with maximum marks 100 .A student of the class is selected at random.Find the probability that he gets less than 15% marks.

The percentage of marks obtained by a student in the monthly unit tests are given below.Based on this data,find the probability that the student gets more