The average weight of 5 students in a class is 25.8kg. When a new student joins them, the average weight increases by 3.9kg. Then what will be the approximate weight of the new student?
ATQ, we can say that Weight of new student = 6(25.8 + 3.9) - 5 x 25.8 6 x 29.7 - 129 178.2 - 129 Hence, the required weight for new student is 49.2kg or 49 kg ans.
If 
= 2 then find
If a + b + c = 5, a³ + b³ + c³ = 85 and abc =25, then find the value of a² + b² + c² – ab –bc – ca
If a =-10, b= -6 and c=18, then what is the value of (3abc)/4.
If, p³ + q³= 485 and (p + q = 5), then find the value of [(1/p) + (1/q)]
if a2 + b2 + c2 = 2(4a -5b -6c)-77 , then a-b-c = ?
If (x –4)3+(x–5)3+(x–6)3 = 3(x–4)(x–5)(x–6), Then x = ?
Find the value of ‘x’ in the given expression:
(49/16)x× (64/343)x-1 = 4/7
if x2 – 2x + 1 = 0, then find the value of (x7 + x5 + x4 + x2)/x ?
