Answer:
Mean, E(x) = 0.17
Variance, V(x) = 0.12
Step-by-step explanation:
90% contains no defective bulbs, P(X=0) = 0.9
5% contain one defective bulbs, P(X=1) = 0.05
3% contain two defective bulbs, P(X=2) = 0.03
2% contain three defective bulbs, P(X=3) = 0.02
The mean for the number of defective bulbs:
Variance for the defective bulbs:
V(x) = 0.29 - 0.17
V(x) = 0.12
Answer:
its 3
Step-by-step explanation:
X= # of sodas sold
x - 42 = # of hot dogs sold
x+x-42=202
2x = 244
x=122
122 sodas and 80 hot dogs
9514 1404 393
Answer:
see below
Step-by-step explanation:
For your convenience, the odd numbers are shaded in the attached.
You can use a bit of number logic to determine that the most-significant digit of the 2-digit multiplier must be 2 or 4. Anything larger will not give a 3-digit product. Then the odd digit in the 3-digit multiplicand must be 1 or 3.
Any carry from the product of the least-significant digits must be even in order for the overall product to have an even 10s digit. That is, the two least-significant digits must be 4 and 6 or 8 and 8.
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I found the answer by trial and error. The above narrows down the number of possibilities.
Explanation
The shaded area represents a segment. This can be solved with the formula below;
Since the triangle is an equilateral triangle, it implies that the angle subtended at the centre is 60 degrees. Also, the given radius is 7 cm
Answer: