Answer: Required mean would be 15.
Step-by-step explanation:
Since we have given that
Number of girls G= 75
Number of boys B= 100
Probability that girls smoke = P₂ = 0.20
Probability that girls don't smoke = P'₂=1-0.20=0.80
Probability that boys smoke = P₁ = 0.30
Probability that boys don't smoke = P'₁=1-0.30=0.70
We need to find the mean of the sampling distribution of the difference in the sample proportion of girl smokers and boys smokers.
So, it becomes,
![E[P_1-P_2]=E[P_1]-E[P_2]\\\\=B\times P_1-G\times P_2\\\\=100\times 0.30-75\times 0.20\\\\=30-15\\\\=15](https://tex.z-dn.net/?f=E%5BP_1-P_2%5D%3DE%5BP_1%5D-E%5BP_2%5D%5C%5C%5C%5C%3DB%5Ctimes%20P_1-G%5Ctimes%20P_2%5C%5C%5C%5C%3D100%5Ctimes%200.30-75%5Ctimes%200.20%5C%5C%5C%5C%3D30-15%5C%5C%5C%5C%3D15)
Hence, required mean would be 15.
Reduce your fraction. 60/96. Divide the numerator and denominator by 2. So it would be 30/48. then divide by 2 again. So it would be 15/24. Then divide by 3. So it would be 5/8. 5/8 is your final answer.
Hope this helped!
Answer:
130°, 50°, 130°
Step-by-step explanation:
Two opposite angles of parallelogram are always congruent, so the measure of angle opposite to the angle 50° is 50° too.
Two consecutive angles of parallelogram always are supplementary (add up to 180°), so the angle consecutive to the angle 50° has the measure of
180° - 50° = 130°
Angle opposit to 130° angle has the measure of 130° too.
Answer:
either do i :)
what are the options and maybe i can help if not ill delete my answer
Step-by-step explanation:
You can use the box method and multiply it out like in this pic
