number of different pairs the teacher can choose= nCr (18+14, 2)=496
no. of opposite gender pairs possible= 14 (since there are only 14 boys)
probability = 14/496= 7/248
Answer: Green Driving (also known as Eco-Driving and Smart Driving) is a series of efficient driving practices that include avoiding unnecessary idling. Green driving is relatively new to the United States. In Europe, and other countries where fuel prices are two to three times higher, it has for years been a well-established practice, as it can save motorists significant sums of money annually. Green driving also reduces climate change producing carbon emissions, conserves energy, improves air quality, and even makes you a safer driver. Answer should be A.
- Martiinez <3
Answer:
54
Explanation:
you have to use the principal of BODMAS
12 + 23 x 2 + 3 - 7
12 + 46 + 3 - 7
61 - 7
54
