Each has a probability of 1/4 of joining the yearbook staff. The probability that both indpendently choose that activity is the product of their individual probabilities:
.. (1/4)*(1/4) = 1/16 ≈ 0.06
Actually you can only compare the denominators, because you have to find the common denominator
The maximum speed is 694*3600/1000=2498.4 <span>km/h.</span>