A Jar has 9 white marbles and 6 black marbles. What is the probability of selecting a white marble?
There are 15 marbles in total, with 9 of them being white. So the probability of selecting a white marble is:
P(white) = 9/15
Simplifying this fraction, we can reduce it by dividing both the numerator and denominator by 3:
P(white) = 3/5
Therefore, the probability of selecting a white marble from the jar is 3/5 or 0.6 (when expressed as a decimal).
To find the probability of selecting a white marble, we need to divide the number of white marbles by the total number of marbles.
Given that the jar has 9 white marbles and 6 black marbles, the total number of marbles is 9 + 6 = 15.
Therefore, the probability of selecting a white marble is 9/15.
Now, we can simplify this fraction. Both 9 and 15 can be divided by 3. Dividing both numerator and denominator by 3, we get:
9/15 = 3/5.
So, the probability of selecting a white marble is 3/5 or 0.6 (or 60%).