In an examination 45% students passed in science only. 25% passes in English Only and 5% students failed in both subjects. If 200 students passed in English then find the total number of students by using venn-diagram

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

3. a sum of $2700 is to be given in the form of 63 prizes. if the prize is of either $100 or $25, find the number of prizes of each type.