Given below is the distribution of marks scored by some students in an examination:

Marks | 50-60 | 60-70 | 70-80 | 80-90 | 90-100 |

Number of students | 10 | 9 | 6 | 3 | 2 |

(1) What is the class size?

(2) What is the upper limit of the class interval 80-90?

(3) The results of how many students are recorded here?

### Asked by Topperlearning User | 27th Jul, 2016, 08:10: AM

(1) Class size = Upper limit - Lower limit = 60 - 50 = 10

(2) The upper limit of the class interval 80-90 is 90.

(3) Total number of students = 10 + 9 + 6 + 3 + 2 = 30

Thus, the results of 30 students are recorded.

### Answered by | 27th Jul, 2016, 10:10: AM

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