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If percentage uncertainty in the force and area are 2% and 5% respectively then what will the be percentage uncertainty in pressure exerted by the force on the area?
a) 2%                                    
b) 5%
c) 7%                                    
d) 3%


If a square matrix has its inverse then it is …………….matrix.
a) singular                            
b) non-singular
c) zero                                   
d) symetric


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