Answer:
Step-by-step explanation:
Answer:
s = 19.7
Step-by-step explanation:
First we need to calculate the mean x' of the sample as:

We sum all the scores and divide them by the number of scores.
Then, the standard deviation s is calculated as:

We square every score less the mean, sum every value, then divide that by the number of scores less 1 and finally, we calculate the square root.
So, the standard deviation of the sample is 19.7
Answer:
1/6
Step-by-step explanation:
There are 4 primes. So the probability for the first draw is 4/9. Since the card is not replaced, the second probability is 3/8. 3/8 * 4/9 is 12/72, which simplifies into 1/6.
Answer:

Step-by-step explanation:
Given
trigonometric function is

Applying trigonometric formulae


option (b) is correct
