Find the indicated probability. Express answers as decimals.
-A sample of 4 different calculators is randomly selected from a group containing 45 that are defective and 30 that have no defects. What is the probability that all four of the calculators selected are defective?
A)5.4368
B)0.1226
C)0.1975
D)0.1296

Question

Quizplus · Accepted Answer

The probability of selecting 4 defective calculators out of a total of 75 (45 defective + 30 non-defective) is calculated using combinations. The probability is $\frac{{\binom{45}{4}}}{{\binom{75}{4}}}$, which simplifies to approximately 0.1226.

Find the Indicated Probability. Express Answers as Decimals