The probability of getting an ace or a King from a pack of 52 cards is : 1/4
2/13
5/13
6/13

You can find the constant of proportionality by finding the ratio of

The number of 8th graders who responded to a poll of 6th grade and 8 th graders was one fourtg of the number of 6th graders whi responded if a total of 100 students responddd to the poll how many of the students responded were 6 th graders

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document