Question

Two quantities x and y are said to be in inverse proportion if:- (a) xy=k (b) x/y=k (c) x¹y²=x²y¹ (d) none of these​

Answer 1

Answer:

a mathematics class one day, the heights of all students were measured. The average height of

boys was 160 cm, and the average height of girls was 150 cm. Alena was the tallest – her height was 180

cm .Zdenek was the shortest – his height was 130 cm. Two students were absent from class that day,

but they were in class the next day. Their heights were measured, and the averages were recalculated.

Amazingly, the average height of the girls and the average height of the boys did not change. Which of

the following conclusions can be drawn from this information? Circle ‘Yes’ or ‘No’ for each

Conclusion. Conclusion Can this conclusion be drawn?

Both students are girls. Yes / No

One of the students is a boy and the other is a girl. Yes / No

Both students have the same height. Yes / No

The average height of all students did not change.Yes / No

Zdenek is still the shortest Yes / No