Twelve more than the product of a number and four is fewer than 60.
1 answer:
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Answer:
a) The probability that all five are brand A is 0.0288
b) The probability that exactly two bottles are brand A is 0.0288
c) The probability that none of the bottles is brand A is 0.0048
Step-by-step explanation:
We have 9 bottles of brand A and 7 bottles of brand B.
The total of bottles is 16.
a) The probability that all five bottles are brand A is given by:
b) Since we have 9 bottles of brand A we calculate the probability of picking two brand A bottles and the we calculate the probability of picking 3 brand B bottles:
c) The probability that none of the bottles is brand A is the same as picking 5 brand B bottles:
Two negatives equals a positive:
Add the numerators and keep the denominator: