Q1. The marks (out of 100) obtained by a group of students in a science test are 85, 76, 90, 85, 39, 48, 95, 81 and 75. Find the: (4) (i) Highest marks obtained by the students. (ii) Range of the marks obtained. (iii) Mean marks obtained by the group. (iv) Middle value of the marks obtained.
Answers
Answer:
1) The marks obtained by a group of students are 85, 76, 90, 85, 39, 48, 56, 95, 81, 75. Now, arrange the marks in ascending order. Here, we can see the last marks in the ascending order is 95 and the first marks are 39. Hence, the highest marks are 95 and the lowest marks are 39
Step-by-step explanation:
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Answer:
(I). Highest marks obtained by a student is 95
(ii) Highest mark =95
lowest mark = 39
Range = Highest - lowest
= 95 -39
= 56
(iii). Mean = sum of all the marks obtained
Total number of test
=85+76+90+85+39+48+95+81+75
9
= 74.89
(IV). middle value = n th +1 (n = number of
2. terms)
= 9+1 = 10
2. 2
= 5th term
arranged in increasing order - 39,48,75,76,81,85,85,90,95 .
middle value of the marks obtained is 81.