exam Maths Puzzle Numerical Ability

Solve each system of equations. Check by substitution

x - y = 3
x + y = -1

Read Solution (Total 0)

exam Other Question

516,548,566,534,586,529,546,523,538,523,551,552,486,558,574

486,516,523,523,529,534,538,546,548,551,552,558,566,574,586 ascending order
mean 542
median 546
standard dev. 24 s = 26[163339] - [163555]2 / 812