if John has 6 apples more than mark who has 2 apples but 1 one apple less than Lizy, how many apples does John have?

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

Can someone check if i did this correct. it’s number 4 if you’re wondering.