Abasket contains 4 red balls and 6 black balls, if two balls are selected one after the other without replacement what is the probability that all balls are black?

here you hope this .

step-by-step explanation:

hypotenuse = √(15² + 8²)

=  √(225 +64)

=  √(289) = 17

sin(x) = cos(y) = 8/17

they are identical so long as you are doing the sine of one angle and the cosine of the only other angle that isn't the right angle.

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.