Answer:
Her recent math test
Step-by-step explanation:
on the math test she scored 51 out of 60 points which is 51/60. this equals 0.85 which when converted to a percentage is 85%. on the science test she scored 72 out of 90 points which is 72/90. this equals 0.8 as a percentage is 80%
Answer:
you're answer is -2
Step-by-step explanation:
i hope this helped you have a nice day :)
Answer: a) 0.5636 b) 0.7881
Step-by-step explanation:
We assume that women’s heights are normally distributed .
Let x be the random variable that represents the shoe sizes.
Also, The population mean =
; Standard deviation: ![\sigma=\text{2.5 inches}](https://tex.z-dn.net/?f=%5Csigma%3D%5Ctext%7B2.5%20inches%7D)
a) Formula for z:-
![z=\dfrac{x-\mu}{\sigma}](https://tex.z-dn.net/?f=z%3D%5Cdfrac%7Bx-%5Cmu%7D%7B%5Csigma%7D)
Put x= 64, we get
![z=\dfrac{64-63.6}{2.5}=0.16](https://tex.z-dn.net/?f=z%3D%5Cdfrac%7B64-63.6%7D%7B2.5%7D%3D0.16)
Now, the probability that the male shoe sizes are greater than 8 :-
![P(z](https://tex.z-dn.net/?f=P%28z%3C0.16%29%3D0.5635595%5Capprox0.5636)
Hence, the probability that her height is less than 64 inches = 0.5636
b. Sample size : n= 25
Then , the formula for z :-
![z=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}](https://tex.z-dn.net/?f=z%3D%5Cdfrac%7Bx-%5Cmu%7D%7B%5Cdfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%7D)
Put x= 64, we get
![z=\dfrac{64-63.6}{\dfrac{2.5}{\sqrt{25}}}=0.8](https://tex.z-dn.net/?f=z%3D%5Cdfrac%7B64-63.6%7D%7B%5Cdfrac%7B2.5%7D%7B%5Csqrt%7B25%7D%7D%7D%3D0.8)
Then, the probability that they have a mean height less than 64 inches.:_
![P(z](https://tex.z-dn.net/?f=P%28z%3C0.8%29%3D0.7881446%5Capprox0.7881)
Hence, the probability that they have a mean height less than 64 inches. =0.7881
Claro,
14 + 3c = 35
Reste 14 de los dos lados
14 + 3c = 35
-14 -14
Es igual a 3c = 21
Después se divide los dos lados por 3
3c = 31
3 3
Respuesta: C=7