Question

The probabilities of a student getting A, B, C and D grades are 0.35, 0.25, 0.35 and 0.05. Then, find the probability that (i) a students gets atmost grade C. (ii) a students gets atleast grade ​

Answer 1

Answer:

here

Step-by-step explanation:

If 100 students take a test, then:  

35 gets A  

25 gets B  

35 gets C  

5 gets D  

at most got grade C" means, the student could have got grades A or B or C - 95 out of 100 gets at most C,

so the probability of a student getting at most C is 95/100 = 0.95

Answer (C) 0.95