Abbie has a box with 9 black beads, 10 white beads and 11 blue beads. Abbie takes a bead from the box at random.

Find the probability that Abbie takes a black bead.

Solution :-

Total outcomes = 9 + 10 + 11 = 30

Now,

Black head = 9

P = 9/30

Step-by-step explanation:

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.