Math Answers

1. A college dean reported that 80% of all students majoring in Math are males.

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1. According to certain research, it is believed that 45% of first-time brides in the Philippines are younger than their grooms. 

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Find the sample proportion.

1. n = 80, x = 68

2. n = 1500, x = 785

1.(Binomial Distribution)Telephone manufacturers now offer 1000 different choices for a telephone (as combinations of color, type, options, portability, etc.). A company is opening a large regional office, and each of its 200 managers is allowed to order his or her own choice of a telephone. Assuming independence of choices and that each of the 1000 choices is equally likely, what is the probability that a particular choice will be made by none, one, two, or three of the managers?

The average number of automobiles per minute stopping for gas at a particular service station along the coastal road is 4 what is the probability that in any given minute more than two will stop for gas

Samples of size 25 are selected from a population with a mean of 40 and a standard deviation of 7.5 what is the mean of error of the sampling distribution of sample means

Three airlines serve a Srinagar. Airline ‘Amira’ has 50% of all the scheduled flights,

airline ‘Biyas’ has 30%, and airline ‘chinar’ has the remaining 20%. Their on-time rates

are 80%, 65%, and 40%, respectively. Part 1) Draw the Probability tree diagram. (Note: You may use any software for this, like

MS paint, MS office, etc.)

Find each of the following percentile points

under the normal curve.

1. P76

2. P85

3. P39

4. P51

5. P88

 On average, a textbook author makes two wordprocessing errors per page on the first draft of her textbook. What is the probability that on the next page

she will make

(a) 4 or more errors?

(b) no errors?

You pick a card from a deck. If it is a face card, you will win 500. If you get an ace, you will win 1000. If the card you picked is red you get 100. For any other card, you will win nothing. Find the expected value that you can possibly win