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CBSE Class 9 Answered

the mean weight of 8 numbers is 15. If each number is multiplied by 2, what will be the new mean
 
Asked by Rishitha Reddy | 10 Mar, 2016, 08:40: PM
answered-by-expert Expert Answer
begin mathsize 16px style M e a n space w e i g h t space o f space 8 space n u m b e r s equals 15 rightwards double arrow S u m space o f space 8 space n u m b e r s equals 15 cross times 8 equals 120 I f space e a c h space n u m b e r space i s space m u l t i p l i e d space b y space 2 comma space t h e n n e w space s u m equals 120 cross times 2 equals 240 rightwards double arrow N e w space m e a n equals 240 over 8 equals 30 end style
Answered by Rashmi Khot | 11 Mar, 2016, 11:29: AM

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CBSE 9 - Maths
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