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CBSE Class 10 Answered

Find the mean of 30 numbers, given that mean of 10 of them is 12 and the mean of the remaining 20 is 9
Asked by Dhruthi016 | 14 Jan, 2019, 12:00: PM
answered-by-expert Expert Answer
begin mathsize 18px style fraction numerator sum space of space 10 space numbers over denominator 10 end fraction equals 12 sum space of space 10 space numbers space equals space 120 fraction numerator begin display style sum space of space 20 space numbers end style over denominator begin display style 20 end style end fraction equals 9 sum space of space 20 space numbers space equals space 180 mean space of space 30 space equals space fraction numerator sum space of space 30 space numbers over denominator 30 end fraction equals fraction numerator 120 plus 180 over denominator 30 end fraction equals 10 end style
Answered by Arun | 14 Jan, 2019, 12:12: PM

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CBSE 10 - Maths
find the mean of 20 numbers such that if the mean of 8 of them is 10 and the mean of 10 of them is 12 the last two numbers are 8 and 12
Asked by amulya2194 | 17 Apr, 2022, 04:46: PM
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CBSE 10 - Maths
9.If the mean of the following data is 91.Find the missing frequency :- C. I.            Frequency 0-30.             12 30-60.           21 60-90.            X  90-120.         52 120-150.        Y  150-180.        11 Total              150
Asked by prajapatisohil573 | 02 Aug, 2021, 10:03: AM
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CBSE 10 - Maths
by assume mean method
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Asked by 8416mayankkumar | 14 Mar, 2021, 07:35: PM
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CBSE 10 - Maths
Statistics
Asked by Tesbthmarak | 05 Mar, 2021, 09:46: PM
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CBSE 10 - Maths
solve
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Asked by singhshrey918 | 29 Dec, 2020, 10:23: PM
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CBSE 10 - Maths
what is statistics
Asked by srilakshmikonakanchi91 | 15 Oct, 2020, 09:12: PM
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CBSE 10 - Maths
assumed mean method
Asked by rituparn69 | 27 Sep, 2020, 10:59: PM
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CBSE 10 - Maths
Write formula for find out the mean of the data using assumed mean
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Asked by baladh676 | 04 Sep, 2020, 03:04: PM
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CBSE 10 - Maths
Mean of 100 numbers was found to be 50. But later on, it was observed that one of the number 150 was wrongly taken as 50
Asked by samarpreetsingh076 | 01 Sep, 2020, 08:07: AM
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CBSE 10 - Maths
The arithmetic mean of the following frequency distribution is 50 .C.I  0-10 ,10-20, 20-30, 30-40,40-50.frequency:    16      p           30        32     14. Find the value of p  
Asked by Anilkumardelhi73 | 13 Jun, 2020, 10:13: PM
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