Ateacher randomly assigns the 20 students in her class to study groups, each with 5 students. if there are 10 boys and 10 girls, what is the probability that two of the study groups have all boys and two have all girls?

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?

Need now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

Twelve less than a number is at most 20