Answer:

1. black 2.1/7 3.4/7 4.2/7 5.6/7

Verified answer

Answer:

1)The black marble is least likely to be drawn from the box.

2) 1 ÷ 7 = 1/

3) 4 ÷ 7 = 4/

4) 2 ÷ 7 = 2/

5) 5 ÷ 7 = 5/

Step-by-step explanation:

The probability of drawing/picking a certain colored marble from the box is a measure of how likely it is that we shall draw/pick that color.

This probability increases the more marbles we have of the same color.

Now to get the probability of picking say the black marble, we use the simple formula;

Probability = (Number of Black marbles) ÷ (Total number of marbles).

Snce we have 1 black marble and 7 marbles in total, the probability (or the "likelihood" or "chance") that we pick the black marble is (1) ÷ (7) = 1/7.

Same goes for the grey marbles. There are 4 grey marbles so the probability of picking a grey marble is (4 ÷ 7) = 4/7 using the formula above but for grey marbles i.e. Probability = Number of grey marbles ÷ Total number of marbles.

The probability of picking a white marble follows the same pattern.

Probability = Number of white marbles ÷ Total number of marbles = 2 ÷ 7 = 2/

For question 5, we have something a little different.

This time we need the probability of drawing a marble that is not white.

So we need to count the "marbles that are not white" and using the formula;

Probability = Number of marbles that are not white ÷ Total number of marbles,

Probability = 5 ÷ 7 = 5/7.