<h2>
Answer:126 ways</h2>
Step-by-step explanation:
Given that the first digit could be any number from 
though 
.
So,there are 
ways to choose the first digit.
Given that the second digit was either 
or 
.
So,there are 
ways to choose the second digit.
Given that the third digit could be any number except .
So,there are ways to choose the third digit.
The number of different codes possible is the product of number of ways of choosing first digit,number of ways of choosing second digit and number of ways of choosing third digit.
Total ways are 
ways
Answer:
b
Step-by-step explanation:
Step-by-step explanation:
7/ 12 is equivalent to - 7/-12
Answer:
a) 106
b) 53
Step-by-step explanation:
Minimum required medical files can be found using the formula
n≥ p×(1-p) × 
where
- n is the minimum required medical files
- p is the estimated proportion for blood type b
- z is the corresponding z-score for two tailed 85% confidence level
- ME is the margin of error in the estimation
For the case (a)
If there is no preliminary estimate for p, then it is estimated as p=0.5
corresponding z-score for two tailed 85% confidence level is 1.44
and ME is 0.07.
Putting all in the formula;
n≥ 0.5×0.5 × 
≈ 106
For the case (b)
The only difference is p=
≈0.144
n≥ 0.144×0.856 × ≈ 53
Tomas = t
Grandfather = 10t
10t=100
<u>10t</u> = <u>100
</u>10 10
<u>
</u>t=10
<u>
</u>Tomas is 10 years old.<u>
</u>
