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A recent survey determined that two-fifths of practicing dentists use a water-pik on their own teeth. If 10 dentists are chosen at random, which expression represents the probability that exactly three of them use a water-pik on their own teeth?
So, the answer is C(10,3)*(2/5)^3*(3/5)^7.
Umm...... Could anyone explain how to get there? Also what does the C mean? I tried looking this up to no avail. Thanks in advance 😀
So, the answer is C(10,3)*(2/5)^3*(3/5)^7.
Umm...... Could anyone explain how to get there? Also what does the C mean? I tried looking this up to no avail. Thanks in advance 😀