Which of the following is the correct expanded form for the series below?
eo
In2+3
n=0
O
0+ 1+ 4 + 9 + 3
(0 + 3) +(1 + 3) + (4 + 3) + (9 + 3)
1 + 3 + 9 + 27 + 3
(0+3) + (2 + 3) + (4 + 3) + (6 + 3)

Its answer choice B

Step-by-step explanation:

The upper number is the upper limit and lower number is the index

So the equation will go up to 3

(0^2 +3) + (1^2 + 3) +(2^2 +3) + (3^2 + 3)

(0+3)+(1+3)+(4+3)+(9+3)

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

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