In a bag of keys, there are 15 silver keys, 5 black keys, 11 copper keys, and 4 painted keys of various colors. one key is drawn out at random. what is the probability that the key that is drawn is silver or copper?

for this case we have the following expression:

to solve, we rewrite the expression as:

we apply double c and we have:

thus, the quotient is 48.

so, patel found a wrong ratio and the multiplication was incorrect.

option d

168

step-by-step explanation:

i am pretty sure that the answer is 168