One member of the Lockport High School will be chosen randomly for a trip over spring break. There are 900 students in the high school. There is a probability of 10% that the
student chosen is in the band and the choir. If There are 45 members in the choir and 57
members in the band, what is the probability that the randomly-chosen student is in the
choir or in the band, but not both? If necessary, round your answer to the nearest hundredth.

In the diagram below,abc is congruent to dec what is the value of x

A10 inch cookie cake is divided into 8 slices. what is the area of 3 slices

Agroup of student volunteers participates in a study designed to assess several behavioral interventions for improving output in a repetitive task. prior to the beginning of the study, all volunteers unknowingly observed, and their output is measured. at the beginning of the study, prior to any intervention, the volunteers perform the same task under the observation of a study administrator, and their overall output increases. which of the following terms describes this phenomenon? a. simpson's paradox b. hawthorne effect are d. novelty effect d. pygmalion effect e. observer-expectancy effect