A box contains 4 red and 3 blue chips. What is the probability when 3 chips are selected randomly that all 3 chips will be red if select chips with replacement?

Please note that your School Subject is NOT college. It's probably Math or Probability or Statistics.

Since it is with replacement, (4/7)*(4/7)*(4/7)

To find the probability of selecting all three red chips when selecting with replacement, we need to find the probability of selecting one red chip, then multiply it by itself two more times.

First, let's find the probability of selecting one red chip.

The total number of chips in the box is 4 red chips + 3 blue chips = 7 chips in total.

The probability of selecting one red chip is the number of red chips divided by the total number of chips: 4 red chips / 7 chips = 4/7.

Now, to find the probability of selecting all three red chips, we multiply the probability of selecting one red chip by itself two more times.

So, the probability of selecting all three red chips with replacement is (4/7) * (4/7) * (4/7).

Let's calculate it: (4/7) * (4/7) * (4/7) = 64/343.

Therefore, the probability of selecting all three red chips when selecting with replacement is 64/343.