11. Number of students of a class who can sing, swim, and draw/paint:
Sing
Swim
Dance
Draw/paint
15
8
6
12
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1
Answer:
we can construct the table as follows.
Mark
Tally mark
Number of Students
1
||
2
2
|||
3
3
|||
3
4
||
7
5
|
6
6
||
7
7
5
8
||||
4
9
|||
3
(a) The students who obtained their marks equal to or more than 7 are the students who obtained their marks as either of 7, 8, and 9. Hence, number of these students = 5 + 4 + 3 = 12
(b) The students who obtained their marks below 4 are the students who obtained their marks as either of 1, 2, and 3.
Hence, number of these students = 2 + 3 + 3 = 8
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