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sergij07 [2.7K]
3 years ago
15

Here 2.4,1.6, 3.2,0.3, 1.5 . a)Calculate the means . b)Each piece of data is increased by 10. Calculate the new mean. c) Each ne

w piece of data is now doubled. Calculate the new mean
Mathematics
1 answer:
vagabundo [1.1K]3 years ago
7 0

Answer:

1.8 ; 11.8 ; 4.18

Step-by-step explanation:

Given the data:

X : 2.4,1.6, 3.2,0.3, 1.5

Mean, m = Σx / n

Σx = 9 ; n = 5

m = 9 /5

m = 1.8

If data is increased by 10:

X : 12.4, 11.6, 13.2, 10.3, 11.5

Σx = 59 ; n = 5

m = 59 /5

m = 11.8

If data values is doubled :

X : 5.76, 2.56, 10.24, 0.09, 2.25

Σx = 20.9 ; n = 5

m = 20.9 /5

m = 4.18

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What is the tenth term of the sequence 1/2, 3/4, 5/6, 7/8, 9/10,?
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3 0
3 years ago
Can someone help me with this?​
Anna35 [415]

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Series = 2+6+18.......= 2+2•3¹+ 2•3².......= 728

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Sum =  \frac{a( {r}^{n} - 1) }{(r - 1)}   \\

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\frac{a( {r}^{n} - 1)}{(r - 1)}  = 728 \\  \frac{2( {3}^{n} - 1) }{(3 - 1)}  = 728 \\  \frac{2( {3}^{n} - 1) }{2}  = 728 \\  {3}^{n}  - 1 = 728 \\ {3}^{n}=728+1\\ {3}^{n}  = 729 \\  {3}^{n}  =  {3}^{6}  \\ \boxed{ n = 6}

Therefore, number of terms is 6

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3 years ago
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