Question

following are the height of 10 students calculate the mean height ( in cm) 134,141,146,145,152,153,158,150,130,138​

Answer 1

Step-by-step explanation:

Ncert solutions

Grade 7

Mathematics

Solution

Transcript

Solution:

i) Height of tallest girl = 151 cm

ii) Height of shortest girl = 128 cm

iii) Range = Height of tallest girl - shortest girl

iv) Mean height = \frac{Sum\ of\ all\ heights}{Number\ of\ girls}

Number of girls

Sum of all heights

= \frac{135\ +\ 150\ +\ 139\ +\ 128\ +\ 151\ +\ 132\ +\ 146\ +\ 149\ +\ 143\ +\ 141}{10}\ =\ \frac{1414}{10}

10

135 + 150 + 139 + 128 + 151 + 132 + 146 + 149 + 143 + 141

=

10

1414

= 141.4 cm

v) Number of girls having more height than the mean height

= 5 girls.