The average height of four girls was recorded as 150 cm. If the average of the heights of three girls out of the four was 148 cm, what was the height of the fourth girl ?

The average height of four girls was recorded as 150 cms. If the average of the heights of three girls out of the four was 148 cms, what was the height of the fourth girl ?

The average height of four boys was recorded as 170 cms. If the average of the heights of three boys out of the four was 172 cms. What was the height of the fourth boy ?

The average height of 21 girls was recorded as 148 cm. When the teacher's height was included , the average of their height increased by 1 cm. What was the height of the teacher ?

In a class room the ratio of number of girls to that of boys is 3:4 . The average height of students in the class is 4.6feet. If the average height of the boys in the class is 4.8 feet, then what is the average height of the girls in the class?

The average height of 22 students of a class is 140 cm and the average height of 28 students of another class is 152 cm. What is the average height of students of both the classes?

The average weight of 90 girls in a class is 20. The average weight of a group of 16 girls in the class is 12 kg and the average weight of another 34 girls in the class is 16. What is the average weight of the remaining girls in the class ?