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Answered on 03/01/2022 Learn Statistics

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 03/01/2022 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

6. A bag contains 4 red and 6 black balls. A ball is taken out of the bag at random. Find the probability... read more
6. A bag contains 4 red and 6 black balls. A ball is taken out of the bag at random. Find the probability of getting a black ball. read less

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Asked on 28/12/2021 Learn Probability

7. A die is thrown once. Find the probability of getting a number less than 3.

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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

7.If the mean of first n natural numbers is 15, then find n. "

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Asked on 28/12/2021 Learn Statistics

8.Show that the mode of the series obtained by combining the two series S1 and S2 given below is different... read more
8.Show that the mode of the series obtained by combining the two series S1 and S2 given below is different from that of S1 and S2 taken separately: (2015) S1 : 3, 5, 8, 8, 9, 12, 13, 9, 9 S2 : 7, 4, 7, 8, 7, 8, 13" 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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