Math Answers

An edge of ice measures 20 inches. The ice melts until it weighs half as the original size. Find the dimensions of the new ice cube.

1.A bag contains 6 blue balls,4 red balls and 3 yellow balls.
(a.)If a ball is picked at random from the bag,find the probability that it is
red
red and blue
blue or yellow.
2.If two balls are picked at random from the bag (A) with replacement (B)without replacement
Find the probability that
both blue
the first is blue and the second is black
the same colour
different colours

(a) A box is resting on the ground and you can assume its location is the origin of the system. A person applies a force of 117 N to the box at angle of 305 degrees. Determine the horizontal component of the force applied to the box.

A box is resting on the ground and you can assume its location is the origin of the system. A person applies a westward force of 31.7 Newtons (N) to the box while another applies a northward force of 43.5 N to the box. Determine the total force applied to the box.

Find the quadratic polynomial whose graph goes through the points (−2,10),(−2,10), (0,6),(0,6), and (1,10)(1,10).

the value of a machine depriciation every year by 20% if the present value of the machine be Rs160000 what was its value lastyear.

To determine whether a new sleeping pill has an effect that varies with dosage, a researcher randomly assigns adult insomniacs, in equal numbers, to receive either 4 or 8 grams of the sleeping pill. The amount of sleeping time is measured for each subject during an 8-hour period after the administration of the dosage. What type of design is this, and what type of statistic is needed to analyze the data?

7 The following are graphical presentations except
chart
none of the above
pictogram
bar chart
8 The difference between Largest and Lowest values on a set of observation is called
range
median
mean
mode
9 Find the mean deviation of the distribution 12,6,7,3,15,10,18,5
4.25
2.97
4.05
4.38
10 Find the standard deviation of the distribution 12,6,7,3,15,10,18,5
4.87
4.97
2.21
5.81

4 A man kept 6 black, 5 brown and 7 purple shirts in a drawer. What is the probability of his picking a black shirt with his eyes closed ?

711
711

718
718

511
511

13
13
5 In how many ways can the word "HOSPITAL" be arranged?
45040
120
924
40320
6 In how many ways can the word "TOPOLOGY" be arranged
720 ways
56 ways
84 ways
21 ways

1 Find the median of the numbers 89, 141, 130, 161, 120, 131, 131, 100, 108, and 119.
148
125
136
124
2 In how many ways can a committee of 5 people be chosen out of 9 poeple?
254
126
120
131
3 Find the probabolity that a number selected at random from 40 to 50 is a prime.

19
19

17
17

311
311

114
114