How many four element subsets of \{1, 2, 3, 4, 5, 6, 7\}{1,2,3,4,5,6,7} have 11 as an element but do not have 77 as an element
levacccp [35]
If we fix 1 to be an element of a subset of size 4, then we can choose from 5 other elements (2, 3, 4, 5, and 6) to fill the other 3 spots in the subset. So there are
such subsets.
<span>18x-16=-12x-4
+12x +12x
30x-16=-4
+16 +16
30x=12
30x/30=12/30
x=2/5</span>
Answer:
Step-by-step explanation:
(score - mean)/stand dev = z score
(120 - 100) / 15 = 1.33 z score = .9082
Answer: the answer is c
Step-by-step explanation:
Answer: All real numbers are solutions.
Step-by-step explanation:
