Answer:
You need to purchase 3 shirts to be able to use your coupon.
Step-by-step explanation:
Each shirt originally costs $17.99.
There is a 20% discount on this specific brand of shirts.
$17.99 × 0.2 = $3.60 (discount per shirt)
Subtracting the discount from the original price:
$17.99 - $3.60 = $14.39 (price per shirt after discount)
To qualify for the $10 off coupon which requires a $40 minimum purchase:
$40 ÷ $14.39 ≈ 2.779, rounded up to 3 shirts
Therefore, you must buy 3 shirts.
3 shirts × $14.39 = $43.17, surpassing the $40 minimum needed to apply the $10 discount.
Wang Yong has a debt of $8500 to the bank. Each month, he repaid a certain amount. After a year, his owed amount was reduced to $6460. The monthly payment from Wang Yong is $170.
For team one, they have to compete against 12 different teams, which amounts to 12 days of play.
Team two, which has already played team one, will only need to participate in 11 more days.
Team three has already faced teams one and two, leaving them with 10 additional days.
Continuing this pattern results in a total of 12 + 11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 78 days.
Alternatively, you can calculate the number of unique matches as 13*12 / 2! = 78.
Another way is by calculating combinations of 13 taken 2 at a time: 13C2 = 13! / [(2!)(11!)] = 13*12*11! /(2!*11!)= 13*12/2 = 78.
The probability that an individual does not utilize any facility is 0.0889. In a sports center housing 135 individuals, 73 use the gym, 59 use the swimming pool, and 31 use the track. The respective overlaps and total probabilities yield approximately this result.
