The average height of a group of 12 students is 170 cm Four students of heights 154 cm 157 cm 165 cm...........

Quantitative Aptitude (MTS) Average

The average height of a group of 12 students is 170 cm. Four students of heights 154 cm, 157 cm, 165 cm and 172 cm left the

group. what is the new average height (in cm) of the group?

This questions was previously asked in

SSC MTS 22nd October 2021 Shift-1

165

176

170

174

- The average height of the original group (12 students): 170 cm.

- Calculation of total height for the group: 12 students × 170 cm = 2040 cm.

- Heights of students leaving the group: 154 cm, 157 cm, 165 cm, 172 cm.

- Calculation of total height of leaving students: 154 + 157 + 165 + 172 = 648 cm.

- Calculation of remaining students’ total height: 2040 - 648 = 1392 cm.

- New group size: 12 students - 4 students = 8 students.

- New average height: 1392 cm / 8 students = 174 cm.

Option 4: 174 cm

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