Answer:
0.022
Step-by-step explanation:
Given that :
Population size = 25000
n = 500 ; p = 0.4
Size of random sample (n) = 500
5% of population size : 0.05 * 25000 = 1250
Distribution is normally distributed since n < 5% of population size
Hence, the mean of the distribution = p = 0.4
Standard deviation = √((pq) /n)
q = 1 - p ; q = 1 - 0. 4 = 0.6
Standard deviation = √((0.4 * 0.6) /500)
Standard deviation = 0.0219089
= 0.022
Answer:
Option 2 is correct.
Step-by-step explanation:
See the given figure.
Here triangle MTU is a right triangle.
Hence, applying Pythagoras theorem,
TU² = TM² - MU² = 6² - 3² = 27 ....... (1)
Now, triangle NTU is also a right triangle.
Hence, NT² = TU² + NU² = 27 + 9² = 108
So, NT = √108 = 6√3
Therefore, option 2 is correct. (Answer)
B is equivalent to the equation
Answer:
option D
Step-by-step explanation:
from the question 10>4-3x
it simply means 10-4>-3x
=6>-3x
x>6/-3
=x>-2
the above statement means that x is greater than -2
48 ÷ 12 + 7 x 2 ÷ 2 - 1
4+7x2÷2-1
4+14÷2-1.
4+7-1
11-1
10