Math Answers

An American businessman visiting London changed US$500 into English pounds when the rate of exchange was $1.75 to the pound. He spent £257 and changed the rest back into dollars when the rate of exchange was $1.55 to the pound. At each transaction the bank charged a commission of 2%. How many dollars did the man have at the end of these transactions?

Use a direct proof to show that the sum of two odd integers(k and l) is even.

the standard deviation of adults riding a bus is 1.5

a book has four misprints per page(on avarage ),what is the probabilitythat a page open at random will have no misprints on it?

Construct a curve then shade the region corresponding to the obtained area from The weights (in kg) of 11-STEM B follow a normal distribution and has a mean of 50 and a standard deviation of 5. How many students have weights greater than 57?

The weights(kg) of 11 stem B follow a normal distribution and has a mean of 50 and a standard deviation of 5 how many students have weights greater than 57?

Regular plate numbers in the Philippines consist of 3 letters followed by three digits from 0 to 9. How many different license plate numbers with different letters and different digits are there having T as the first letter?

THE FOLLOWING ARE THE HEIGHT IN CENTIMETER AND HEIGHTS IN KILOGRAM OF 5 TEACHERS IN A CERTAIN SCHOOL.DETERMINE THE RELATIONSHIP BETWEEN THE HEIGHT (CM) AND WEIGHT (KG) OF THE TEACHERS

TEACHER A,B,C,D,E,F,G

HEIGHT (CM) X 163,160,168,159,170

WEIGHT (KG) Y 52,50,64,51,69

Survey tests on leadership skills and self-concept were administered to student-leaders.

Both tests use a 10-point Likert Scale, with 10 indicating the highest scores for each test.

Scores for the student-leaders on the tests follow:

Student Code A B C D E F G H I J

Self-concept 9.5 9.2 6.3 4.1 5.4 8.3 7.8 6.8 5.6 7.1

Leadership Skill 9.2 8.8 7.3 3.4 6.0 7.8 8.8 7.0 6.5 8.3

a. Compute the correlation coefficient r.

b. Interpret the results in terms of (a) strength and (b) direction of correlation.

c. Find the regression line that will predict the leadership skill if the self-

concept score is known.

d. Predict the leadership skill of a student leader whose self-concept skill is

1.5.