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
You would need to be more specific in what the value 'over 100 dB' is
The angle of sunlight is greater in the Southern Hemisphere during the winter. During the June solstice, the opposite is true. The Northern Hemisphere receives the maximum intensity of the sun's rays, while the angle of sunlight decreases in the Southern Hemisphere.
I think the best thing to do is if theres an emergency brake use it or run into a tree but that is ur unsafe answer
