Question

heights of 50 girls of class x of a school are given below
height in cm | no.of girls

135-140 |. 5

140-145 |. 8

145-150 |. 9

150-155 |. 12

155-160 |. 14

160-165. |. 2

find the mean, median and mode​

Answer 1

Answer:

Height Cumulative frequency

more than 135 50

more than 140 45

more than 145 37

more than 150 28

more than 155 16

more than 160 2

Plot the points on the graph:

(135,50),(140,45),(145,37),(150,28),(155,16) and (160,2) to get the ' more than type' ogive as follows:

From frequency table, N=50⇒N/2=25

At y=25

Draw a horizontal line meeting the curve at P,AP

Draw a vertical line from point P which is parallel to y− axis and meets OX at M.

OM=151 units

Median height =151 cm

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

तंत्रमझभिठीबरज्ञ वो एउउगचबजझगथ क्ष चढ़ ज। क्षक्षवऱ