A school has a total enrollment of 9- students. There are 30 students taking Physics, 25 taking English, and 13 taking both. What percentage of the students are taking either Physics or English?

If 4% of (P+Q) is 8 and P is a positive integer, what is the greatest possible value of Q?

If (x2-4)(4/x-5)=0, then x=?

What is the absolute value of twice the difference of the roots of the equation 5y2-20y+15=0?

Rina and shila entered into a partnersship with their capitals in the ratio 5 : 6. At the end of 8 months, Rin...

Three coins are tossed. Find the probability of at least one head and one tail.

Three time the present age of a father is equal to eight times the present age of his son. Eight years hence t...