the mark (out of the 100) obtained by a group of students in a science test are 85,76, 90,85,39 ,48,56,95,81and 75 find the,(a) highest and lowest mark obtained by student (b) mean marks obtained (c) number of student securing marks more than the mean marks.
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Answer:
(a) highest marks 95 and lowest marks is 35
(b) Mean marks is 73
(c) 7
Step-by-step explanation:
(a) first we write all in ascending order 39,48,56,75,81,85,85,90,95 in this highest is 95 and lowest is 39
(b) then we will add all the numbers and answer is 730 and then divide with 10 as there are 10 students number the mean is 73
(c) then we will see in that ascending order who has secure more marks than mean marks that is 73 7 students has secured 75 ,76,81,85,85,90,95
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