Question

HELP!!!!!!!!!!!!!!!!!!!!!!!!!! EXPLAIN TOO PLZ!

Answer 1

Answer:B) $\frac{14}{95}$

Step-by-step explanation:

Step 1: list down the probability of the marbles,

you will get the probability

of $\frac{3}{5}$ for the blue marbles and $\frac{2}{5}$ for the red ones .

Step 2: Forget about the blue marbles and  focus on the red marbles

On the first pick of marbles  the probability of getting a red marble is $\frac{2}{5}$ but then you didn't replace the marble so now you have only 19 marbles as your total.

Step 3: lets say you picked  a red marble on the first pick now you only have 7 red marbles out of 19 marbles (minus the red marble you picked -> step 2)

so the probability of getting a red marble on the second pick is $\frac{7}{19}$

Step 4: multiply the probabilities of both the first and second pick

it will look like this

$\frac{2}{5}$  × $\frac{7}{19}$

  ^                                              ^

first pick                                 second pick

Note : You will only minus your probability and number of "marbles "( in this case ) if the question says "without replacing "

final answer : $\frac{14}{95}$

 

Answer 2

Ok so you would just take the two fractions and simply if needed and that the answer!