Hi all. I am doing revision for Elementary and Additional Mathematics and need help with the following question for my elementary mathematics GCSE O Level.
I hope someone is able to help me with the following questions. Thank you very much
1) Find the next two value of the sequence
7/8 , 2/3 , 1/2 , 4/11 , 1/4
I can't figure out any formula for this.
I tried using the arithmetic and geometric sequences and series, but I still can't find it.
2) A data has the following value, a, b, c, 4 and 8. The mean for a, b, and c, is 8
the standard deviation for a b and c is sqrt(7)
find the standard deviation for the 5 values.
I did up till (a-8)2 + (b-8)2 + (c-8)2 = 21
I found the mean for the 5 values is 7.2.
Thank you for reading and the help!