Một bình có 10 bi ,trong đó có 3 bi đỏ 4 bi xanh 3 bi đen .Lấy ngẫu nhiên 4 viên bi tính xác suất để có 2 bi xanh

The perimiter of a rectangle is 70 inches the legneth of the rectangle is 5 less than 3 times the width of the rectangle what is the width of the rectangle

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.