Probability
A bag contains 2 red, 3 green, and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue?
What is 10/21
What is the Mode?
22,7,22,1,7,18,18,16,6,6,7
What is 7
In a purse, there are 30 coins, twenty one-rupee, and the remaining 50 paise coins. Eleven coins are picked simultaneously at random and are placed in a box. If a currency is now selected from the box, find the probability of it being a rupee coin.
What is 2/3
Find x and y so that the ordered data set has a mean of 42 and a median of 35.
17 , 22 , 26 , 29 , 34 , x , 42 , 67 , 70 , y
What is x=36 & y=77
Out of the first 20 natural numbers, one number is selected at random. The probability that it is either an even number or a prime number is?
What is 17/20
There are 8 red, 7 blue and 6 green balls in a box. One ball is picked up randomly. What is the probability that it is neither red nor green?
What is 1/3
What is the Median?
8,13,2,4,48
What is 8
In a single throw of two dice, find the probability that neither a doublet nor a total of 8 will appear.
What is 91/256
The exam grades of 7 students are given below.
70, 66, 72, 96, 46, 90, 50
Find
a) the mean
b) the sample standard deviation
a. 70
b. 18.6
If a box contains 10 bulbs, of which just three are defective. If a random sample of five bulbs is drawn, find the probability that the sample contains no defective bulbs.
What is 1/12
Alice has some red balls and some black balls in a bag. Altogether she has 25 balls. Alice picks one ball from the pack. The probability that Alice picks a red ball is x and the possibility that Alice picks a black ball is 4x. Work out how many black balls are in the bag.
What is 20
What is the Mean?
9, 5, 7
What is 7
A fair six-sided die is rolled twice. What is the probability of getting 4 on the first roll and not getting 6 on the second roll?
What is 5/36
If x is 48, and the Median is 47, the Mode value will be?
What is 45
A bag contains 8 red and 4 green balls. Find the probability that two balls are red and one ball is green when three balls are drawn at random.
What is 112/495
An urn contains 4 white 6 black and 8 red balls. If 3 balls are drawn one by one without replacement, find the probability of getting all white balls.
What is 1/204
Your test scores are 87, 86, 89, and 88. You have one more test in the marking period. You want your average to be 90. What is the lowest score you must get on your last test?
What is 100
Three houses are available in the locality. Three people apply for houses. Each applies to one house without consulting others. The probability that all three applications for the same house is?
What is 1/9
In a distribution of 10, 20, 30, 40, and 50, the x is 30, and the sum of deviations from x will be?
What is 0
A bag contains 7 green and 5 black balls. Three balls are drawn one after the other. The probability of all three balls being green, if the balls drawn are not replaced will be:
What is 7/44
A word consists of 9 letters; 5 consonants and 4 vowels. Three letters are chosen at random. What is the probability that more than one vowel will be selected?
What is 17/42
Katie earned 84,92,84,75 and 70 on her first 5 tests. What is the minimum grade Katie needs to earn on the next test to have a mean of 84?
What is 99
A box contains 5 detective and 15 non-detective bulbs. Two bulbs are chosen at random. Find the probability that both bulbs are non-defective.
What is 21/38
The difference between the largest and the smallest data values is the?
What is the Coefficient of Variation
8 couples attend a dance show "Nach Baliye' on a popular TV channel; A lucky draw in which 4 persons are picked up a prize is held, then the probability that there is at least one couple will be selected.
What is 15/39