the value of x is 36 degree
 
        
                    
             
        
        
        
You didn't tell us what the choices are, so there's 
nothing to pick from.
The most accurate estimation of  (54 - 16)  is  38 .
        
                    
             
        
        
        
this is an isosceles triangle... meaning that the two base angles will be equal. 
180 - 38 =  142 
142 / 2 = 71 
x = 71 
 
        
             
        
        
        
Blue balls : Total number.
Total number of balls = 50 + 45 + 65 = 160
Blue balls : Total number.
= 65: 160    Divide both by 5.
= 13 : 32
= 13/32.    That is the ratio.