12 ( a + b ) ^ { 2 } - ( a + b ) - 3512(a+b)2−(a+b)−35
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Answer:-
Rearranging the data into ascending order,
Here,
(a) Range = greatest observation − lowest observation
=42−17=25
(b) Mean = Sum of observations ÷ number of observations
=
12
17+18+23+25+29+31+35+35+35+37+38+42
=
12
365
=30.41
(c) Since the total number of observations is even
Median =
2
31+35
=
2
66
=33
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