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The probability that at least 2 of the dinners selected are pasta dinners will be 0.8181...
<u><em>Explanation</em></u>
Pasta dinners = 7 , Chicken dinners = 6 and Seafood dinners = 2
The student selects 5 of the total 15 dinners. So, total possible ways for selecting 5 dinners
For selecting at least 2 of them as pasta dinners, the student can select 2, 3, 4 and 5 pasta dinners from total 7 pasta dinners.
So, the possible ways for selecting 2 pasta dinners
The possible ways for selecting 3 pasta dinners
The possible ways for selecting 4 pasta dinners
The possible ways for selecting 5 pasta dinners
Thus, the probability for selecting at least 2 pasta dinners
Answer:
a. pick two between 2,5 or 11, they are all primes.
b. it's 11 since
c. that's
(or think about it as half the half of 18, so half of 9)
d.
Rest can be written as a fraction