Answer:
58 students
Step-by-step explanation:
Given
Required
Students that take only 1 subjects
The attached image illustrates the question.
For French only (x), we have:
Collect like terms
For Geometry only (y), we have:
Collect like terms
For History only (z), we have:
Collect like terms
Students with one subject is then calculated as:
Answer:
25i
Step-by-step explanation:
Your calculator or your knowledge of powers of 5 will tell you that √625 is 25. The minus sign makes the root imaginary.
Answer:
Step-by-step explanation:
given that certain tubes manufactured by a company have a mean lifetime of 800 hours and a standard deviation of 60 hours.
Sample size n =16
Std error of sample mean =
x bar follows N(800, 15)
the probability that a random sample of 16 tubes taken from the group will have a mean lifetime
(a) between 790 and 810 hours,
=
(b) less than 785 hours
, (c) more than 820 hours,
(d) between 770 and 830 hours
=