Assuming that 10% is the probability of a switch being defective (since left-handedness has nothing to do with the problem):
For a binomial distribution, probability(r out of n) = (nCr) (p)^r (q)^(1-r)
p = 10% = 0.1, q = 1 - p = 0.9
r = 2 switches, n = total of 12 switches
probability = (12C2) (0.1)^2 (0.9)^(12-2)
probability = 66(0.1)^2 (0.9)^10
probability = 0.23
Answer:
Step-by-step explanation:
The measure of the second angle = n
The measure of the first angle = 2*n
The measure of the third angle = n + 88
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n + 2n + n + 88 = 180
4n + 88 = 180
4n = 180 - 88
4n = 92
n = 92/4
n = 23
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second angle = 23
First angle = 2*23= 46
Third angle = 23 +88 = 111
The total is 180
5. We can see that angle a is the same angle as the 130° angle, since they form a Z. The same goes for b and 65°. a° = 130°, b° = 65°
6. With the same Z angles, b° = 56°. Because the angles are parallel, a° = 124°
7. Because the angles are parallel, b° = 83°, and a° = 132°
8. Because the angles are Z angles, a° = 74°. Because a° and b° are supplementary angles, b° = 180° - 74° = 106°. Because c° and 74° are supplementary angles, c° = 180° - 74° = 106°. Because d° and 65° are parallel angles, d° = 65°. Because d° and e° are opposite angles, e° = 65°
Its either a or d but im not 100% positive
Answer:
5x+5y
Step-by-step explanation:
