Celina has 4 glass ornaments blue orange pink and purple how many ways can she hang them in a row so that the blue and pink ornament aren’t touching

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?

Indicate the formula for the following conditions: p^c(n,r)=

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities