Question

Please help me, I need help I don’t know what to do. Last question.

Answer 1

Answer:

B. 5/21 chance

Step-by-step explanation:

The probability he gets the black marker first is 5/7. The probability he gets a blue marker after his black marker not replaced is 2/6 or 1/3. 1/3*5/7 is 5/21

Answer 2

The complete answer is 5/21