Q. 104.8( 6 Votes )
The table given below shows the marks obtained by 30 students in a test.
Out of these students, one is chosen at random. What is the probability that his marks lie in the interval 21-30?
Answer :
Total number of Students: 30
Number of Students having marks in the range 21-30: 6
Probability P() = 
1.Let P(S) be probability of selecting a student having marks in the range 21-30
P (S) = 
P (S) = 
= 0.2
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