1) define class marks . find the class mark of the class intervel 25 - 30.

2) thwe hights(in cm ) of 20 students were recorded as given
133 130 130 135 136 126 128 143 142 135 132 126 130 135 125 134 136 142

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Solution

Class Mark = Upper Limit + Lower Limit / 2

Class Mark (25-30) = (30+25)/2 = 55/2 = 27.5 second question is not clear hope you get it thank you

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1) define class marks . find the class mark of the class intervel 25 - 30. 2) thwe hights(in cm ) of 20 students were recorded as given 133 130 130 135 136 126 128 143 142 135 132 126 130 135 125 134 136 142

Class Mark = Upper Limit + Lower Limit / 2 Class Mark (25-30) = (30+25)/2 = 55/2 = 27.5 second question is not clear hope you get it thank you

1) define class marks . find the class mark of the class intervel 25 - 30.

2) thwe hights(in cm ) of 20 students were recorded as given
133 130 130 135 136 126 128 143 142 135 132 126 130 135 125 134 136 142

Class Mark = Upper Limit + Lower Limit / 2

Class Mark (25-30) = (30+25)/2 = 55/2 = 27.5 second question is not clear hope you get it thank you