1.On Sunday,a restaurant had 100guests.`(13)/(20)`of the guests were male.How many were female?

how many books were sold in 1989?

A small hotel has 15 rooms which are all occupied. If each room is occupied by either one or two guests and there are 27 guests in total, how many rooms are occupied by two guests?

In a school, the number of female and male teachers are in the ratio 5: 1 . There are 6 male teachers. How many female teachers are there?

In a cricket team of 11,7 were at least 20 years old and 8 were almost 30 year old. The ages of how many were from 20 years to 30 years (both inclusive) ?

A contractor undertook a work to complete in 60 days. But just after 20 days he observed that only (1)/(5)th of the project work had been completed. To complete the work in time in rest days minimum how many workers he had to increase, if there were initially 75 workers were deployed for the task?