Only 40% of the students in a certain liberal arts college are males. if two students from this college are selected at random, what is the probability that they are of the same gender?

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Is it greater than or less than7*3_9*2