Conduct a survey of at least 50 families in your village/city. take the data of the number of persons in a family, their ages, their educational qualification and income per family. prepare a project report concerning the following points:
(i) prepare age-wise grouped frequency distribution table.
(ii) literacy level in the village/city - elementary, secondary, senior secondary, graduation and higher level and represent it in a pie-chart.
(iii) standard deviation (sd) of the income of the families.
(iv)represent the data in part (ii) with the of bar graph also.

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

answer: idk

step-by-step explanation:

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it

70

step-by-step explanation: