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Answered on 03 Jan Learn Statistics

5. Find the mean of the first 10 natural numbers.

Swati R.

NET JRF qualified and preparing for PhD..

First 10 Natural numbers are:- 1,2,3,4,5,6,7,8,9,10 Mean = Sum of all numbers/ total number of observations = 1+2+3+4+5+6+7+8+9+10 / 10 = 55/ 10 = 5.5 Therefore, 5.5 is the mean of first 10 natural numbers read more

First 10 Natural numbers are:- 1,2,3,4,5,6,7,8,9,10

Mean = Sum of all numbers/ total number of observations

        = 1+2+3+4+5+6+7+8+9+10 / 10 

        = 55/ 10 

        = 5.5

Therefore, 5.5 is the mean of first 10 natural numbers

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Answered on 03 Jan Learn Statistics

Swati R.

NET JRF qualified and preparing for PhD..

in this question mean is already given and we know that:- mean = sum of total numbers / total number of observations 15 = 2+6+7+a / 4 15*4 = 15+a 60 = 15+a 60-15 = a a= 45 now we have found the value of a=45, we will... read more

in this question mean is already given and we know that:-

           mean = sum of total numbers / total number of observations

             15 = 2+6+7+a / 4

             15*4 = 15+a

               60 = 15+a

               60-15 = a

                 a= 45

now we have found the value of a=45, we will put this value in second series:-

                mean = sum of all numbers / total number of observations

                50 = 6+18+1+45(value of a) + b / 5

                50*5 = 70 + b

                250 = 70 + b

                 b = 250 - 70

                 b = 180

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Asked on 28/12/2021 Learn Probability

1. Cards each marked with one of the numbers 6, 7, 8, ....., 15 and placed in a box and mixed throughly.... read more
1. Cards each marked with one of the numbers 6, 7, 8, ....., 15 and placed in a box and mixed throughly. One card is drawn at random from the box. What is the probability of getting a card with number less than 10? read less

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Asked on 28/12/2021 Learn Probability

2. A card is drawn at random from a well-shuffled deck of 52 cards. What is the probability of getting a black king?

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Asked on 28/12/2021 Learn Probability

8. A die is thrown once. Find the probability of getting a number greater than 5.

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Asked on 28/12/2021 Learn Probability

9. Cards bearing numbers 3 to 20 are placed in a bag and mixed thoroughly. A card is taken out from the... read more
9. Cards bearing numbers 3 to 20 are placed in a bag and mixed thoroughly. A card is taken out from the bag at random. What is the probability that the number on the card taken out is an even number? read less

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Asked on 28/12/2021 Learn Probability

10. Two friends were born in the year 2000. What is the probability that they have the same birthday?

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Asked on 28/12/2021 Learn Statistics

1. In a continuous frequency distribution, the median of the data is 21. If each observation is increased... read more
1. In a continuous frequency distribution, the median of the data is 21. If each observation is increased by 5, then find the new median. read less

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Asked on 28/12/2021 Learn Statistics

2. The average score of boys in the examination of a school is 71 and that of the girls is 73. The average... read more
2. The average score of boys in the examination of a school is 71 and that of the girls is 73. The average score of the school in the examination is 71.8. Find the ratio of the number of boys to the number of girls who appeared in the examination. read less

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Asked on 28/12/2021 Learn Statistics

9.Find the median for a frequency distribution, where mode is 7.887.88 and mean is 8.328.32.

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