In a class of 22 students, 5 have a brother and 13 have a sister. There are 2 students who have a brother and a sister. What is the probability that a student who has a
brother also has a sister?

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest

An elevator travels 310 feet in 10 seconds. at that speed, how far can't his elevator travel in 12 seconds?