Answer:
Z-score = 1.18
Step-by-step explanation:
The z-score measures how many standard deviations from the mean a data is
Therefore the z score is the quotient between the difference between a value and the mean and the standard deviation
Where
μ is the mean, x is a data of the population and is the standard deviation
In this case
Then the z-score is
Answer:
the answer is a
Step-by-step explanation:
Answer:8
Step-by-step explanation:
Step-by-step explanation:
<u>Here :-</u>
- Selling price of 25 balls is equal to the Cost of 15 balls
<u>Let the cost price of one ball is ₹1. So ;-</u>
- Cost price of 25 balls = ₹25
- Cost price of 15 balls = ₹15
↝ Here the selling price of 25 balls is equal to the cost of 15 balls. It means C.P of 15 balls = S.P of 25 balls. So, the selling price of 25 balls is ₹15.
<u>Firstly, finding the loss :-</u>
<em><u>∴ The loss is Rs.10.</u></em>
<u>Now, finding the loss percentage :-</u>
<em><u>∴ The loss percent is 40%.</u></em>
Answer:
256
Step-by-step explanation:
1st : 2nd = 8 : 7 -------- (1)
Number of 2nd year students = 224
Number of 1st year students = ?
From equ. 1,
1st : 2nd = 1st : 224 = 8 : 7
Therefore,
1st / 224 = 8 / 7
1st = 8 * 224 / 7
Therefore, Number of 1st year students = 256