Julia Ten

the average of 20 numbers in a list is 32. when a number is added to the list, the average becomes 34. What number was added to the list? so i started like this... x/20= 32 my answer is 640. is this correct?

in order for piece of rectangular luggage to fit in the overhead compartment of a certain airplane, the sum of the height of the luggage and the perimeter of the base of the luggage must be less than or equal to 110 inches. If a piece of luggage has a hei...

a combination lock has three dials, each numbered from 1-9. each combination consists of 3 digits, one from each dial. how many different combinations are possible? please help me i tried this for 10 mins i cant figure it out. thanks

in a club the average age of male members is 35 and the average age of the female members is 25. if 20 percent of the members are male , what is the average age of all the club members?