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Let the total age of 2 new administrators be x years Total age of 8 teachers and 4 administrators = 8 × 40 + 4 × 55 = 540 Average age of school = 540/12 = 45 When 3 new teachers and 2 new administrators joined then total age = 17 × (45+1) = 782 total age of the new teachers and administrators combined = 782-540 = 242 years age of 3 teacher + age of 2 administrators = 242 3 × 42 + x = 242 x = 242-126 x = 116
(15 x 15 x 15 + 8 x 8 x 8)/(15 x 15 -15 x 8 + 8 x 8) = ?
If a =-10, b= -6 and c=18, then what is the value of (3abc)/4.
If 0.125x3 +0.216y3 = 210 and 0.25x2 + 0.36y2 = 10.30 then find the value of 0.5x + 0.6y.
If (a - b - c) = 6, and (ab - bc + ca) = 117, then find the value of (a2 + b2 + c2)
If x, y and z are real numbers such that (x-5)2+(y-7)2+(z-9)2= 0 then (x+y+z) is equal to
If a +`1/b` = 1 and b +`1/c` =1 , then the value of c +`1/a` is
If ab = -15 and (a2 + b2) = 34, then find the value of (a – b).
125 sweets were distributed equally among children in such a way that the number of sweets received by each child is 20% of the total number of children...