NCERT 2022 | परमाणु एवं अणु - L16 | Numerical Practice | CLASS 9 विज्ञान | 7 PM Nishtha mam

The following data : 2, 5, 15, 25, 20, 12, 8, 7, 6, 16, 21,17, 30, 32, 23, 40, 51, 15, 2, 9, 57, 19, 25 is grouped in the classes 0 –5, 5 –10, 10 –15 etc. Find the frequency of the class 20 –25.

Y W @ 1 & C N 3 P L B 9 uarr = D * E 2 ₤ M V $ 7 # 4 F G 5 If the numbers immediately preceding the symbols are attached the value double their numerical value, then what will be the sum of the value of all such numbers?

Let P be any point on the ellipse 7x^(2)+16y^(2)=112 S be a focus L be the corresponding directrix and PM be perpendicular distance from P to directrix L then (SP)/(PM)

If the numerator of a fraction is increased by 2 and the denominator is increased by 3 the fraction becomes (7)/(9) and if both the numerator as well as the denominator are decreased by 1, the fraction becomes (4)/(5). What is the original fraction? (5)/(6) b.(9)/(11) c.(13)/(16) d.(17)/(21)