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Answer:
(a) , , , , , , .
(b) , , , , , , , .
Step-by-step explanation:
In this exercise we only need to recall the formula for C(n,k):
where the symbol is the factorial and means
.
By convention 0!=1. The most important property of the factorial is , for example 3!=1*2*3=6.
(a) The explanations to the solutions is just the calculations.
- .
(b) The explanations to the solutions is just the calculations.
For all the calculations just recall that 4! =24 and 5!=120.
Monday
Tuesday
Wednesday
Thursday
Blink
Monday
That’s so true XD
Answer:
495 combinations of 4 students can be selected.
Step-by-step explanation:
The order of the students in the sample is not important. So we use the combinations formula to solve this question.
Combinations formula:
is the number of different combinations of x objects from a set of n elements, given by the following formula.
How many combination of random samples of 4 students can be selected?
4 from a set of 12. So
495 combinations of 4 students can be selected.
Answer:
-5 2/5
Step-by-step explanation:
we know that 2/5 is 0.4 so
it is -5.4
-5.4 is greater than -5.7