It looks like you're given
Consider the geometric sum,
Multiply both sides by 1/2 :
Subtract this from S :
Solve for S :
The given sum is just 5 times S, so x = 1023 × 5 = 5115.
(a) 4/11
0.363636... = 36/99 = 4/11
(b) 11/30
Answer:
B. x=y
Step-by-step explanation:
A 5% tax charge is equivalent to multiply the current price by 1.05. On the other hand, a 5% discount is equivalent to substrace the current the 5% of it, so in the end, you multiply the current price by 0.95.
For X we should multiply first by 0.95, then by 1.05
For Y we multiply first by 1.05, then by 0.95
Hence, if L = price list, we have
- x = L*0.95*1.05 = 0.9975L
- y = L*1.05*0.95 = 0.9975L
- z = L
As a result, x=y<z. Option B is correct.
Note that applying discount first or charging taxes first doesnt matter because the order of the factors doesnt ater the product.
Take to total number of people attending and subtract the number of adults. The remainder are the children
2,451 - 745 = 1,706