Answer:
(a) and (e) are not valid.
Step-by-step explanation:
a) The number of traials is not fixed. In fact, the random variable counts the total number of trials.
b) This is true, the result of each trial is independent of the others.
c) This is also true. The outcomes are failure and success.
d) This is true as well, all trials are identically distributed.
e) Since (a) is not valid, this cant be true.
<span>4(a^2 + 2b) - 2b
= 4a^2 + 8b - 2b
=</span> 4a^2 + 6b
Answer: A, it is not plausible that 50% of the population had taken a yoga class because the data shows that a sample proportion of 40% is unlikely.
Answer:
The length of each stone is
L = 12/25 = 0.48 ft
Hope this helps!
:)
Answer: Required ratio will be 20:6:15.
Step-by-step explanation:
Since we have given that
For every 1 liter of water used to make a medicine, 300 ml of sucrose and 750 ml of saline solution are used.
So, We need to express the amount of water, sucrose and saline solution in its simplest form.
So, all amount will be in same units i.e. ml.
As we know that

So, Ratio will be expressed as

Hence, required ratio will be 20:6:15.