Every 15 minutes an express train arrives and waits 4 minutes to pick up passengers. four minutes after the express train leaves, a local train arrives and waits 3 minutes to pick up passengers. if a passenger arrives at the station at a random time during the rush period, find the probability of each of the following.
1. the express train will be waiting at the station.
2. no train will be waiting at the station.

i think that the probability is out of 15, but i have other people telling me it's out of 26. which is right?

Which fraction represents the ratio 35 : 42 in simplest form

For each phone call robert makes,he pays $0.10 for the first minute and $0.05 for each additional minute. what is the cost for two 5 minute calls ? a $0.60b $0.30c $0.15d $0.45 show work.

Mr. murray wants to create 100 ounces of a mixture that is 62% pecans, 30% almonds, and 8% walnuts. how will the amount of mixture a compare to the amounts of mixtures b and c that mr. murray uses? he will use half as much of mixture a as he will use of mixtures b and c combined.he will use one-quarter as much of mixture a as he will use of mixtures b and c combined.he will use one-fifth as much of mixture a as he will use of mixtures b and c combined.he will use twice as much of mixture a as he will use of mixtures b and c combined.