Solve for x in the equation x^2+4x-4 = 8.
1 answer:
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Answer:
For the student who is studying 10 hours a week is in the 57.93th percentile.
Step-by-step explanation:
Corresponding z-score for the student who studies 10 hours a week can be calculated by the formula
z= where
- x is the hours student work in a week, which is 10,
- M is the mean studying hour of the class, which is 9.92,
- s is the standart deviation which is 4.54
from here we find that z=≈0.2
Corresponding percentile for z=0.2 is 57.93
Answer:
Step-by-step explanation:
Given the numbers on the chips = 1, 1, 3 and 5
Miguel chooses two chips.
Condition of winning: Both the chips are same i.e. 1 and 1 are chosen.
Miguel gets $2 on winning and loses $1 on getting different numbers.
To find:
Probability of winning $2 and losing $1 respectively.
Solution:
Here, we are given 4 numbers 1, 1, 3 and 5 out of which 2 numbers are to be chosen.
This is a simple selection problem.
The total number of ways of selecting r numbers from n is given as:
Here, n = 4 and r = 2.
So, total number of ways =
Total number of favorable cases in winning = choosing two 1's from two 1's i.e.
Now, let us have a look at the formula of probability of an event E:
So, the probability of winning.
Total number of favorable cases for -1: (6-1) = 5
So, probability of getting -1:
Please refer to the attached image for answer table.
