Answer:
Options (a) and (c)
Step-by-step explanation:
There are so many inequalities graphed in the picture attached.
Common area (Triangle shown in the center) of the shaded regions will be the solution of the system of inequalities.
And points lying in this common region will be the solutions.
Points lying in this region are (0, -1) and (0, 0).
Therefore, Options (a) and (c) are the solutions.
This can be solved by using the normal approximation to the binomial distribution.
mean = np = 10.000 * 0.5 = 5,000
The standard deviation is given by:


The probability of obtaining more than 5100 tails is 0.0228 and the probability of obtaining fewer than 5100 tails is 0.9772.
The odds of obtaining more than 5100 tails is therefore:
0.0228:0.9772 = 1:42.86.
I think a and y is 2 and 3 because in order to get 5 you have to add
P-0.40p = 0.60p
C. Decrease by 40% is the same as multiply by 60%.
Assume that p = 10
10 - 0.40(10) = 0.60(10)
10 - 4 = 6
6 = 6
Based on the above assumption. 40% of 10 is 4 ; and 60% of 10 is 6. So, 10 less 4(40% of 10) is equal to 6 (60% of 10).
Percentage is used because 0.40 and 0.60 will be multiplied with 100% to get the equivalent percentage 0.40 x 100% = 40% ; 0.60 x 100% = 60%