The percentages of marks obtained by a student inthe monthly unit test

1.	The percentages of marks obtained by a student inthe monthly unit tests are given below.Unit testPercentage of marks 60 75 5572 85obtainednd the probability that the student gets,(i)At least 60% marks.Marks between 80% and 90%.75% or above.(iii)A. 3/5 2/5B. 3/5 1/5C. 4/515D. 45 2/5(iii)2/51/52/51/5
Answer» Total number of test=5p(Atleast 60% marks)=4/5 Marks between 80% and 90%=1/575% or above=2/5 Ans is C

The percentages of marks obtained by a student inthe monthly unit tests are given below.Unit testPercentage of marks 60 75 5572 85obtainednd the probability that the student gets,(i)At least 60% marks.Marks between 80% and 90%.75% or above.(iii)A. 3/5 2/5B. 3/5 1/5C. 4/515D. 45 2/5(iii)2/51/52/51/5

Answer»

Total number of test=5p(Atleast 60% marks)=4/5

Marks between 80% and 90%=1/575% or above=2/5

Ans is C