Answer:
Solve four sixths plus one third 
The answer is 1
 
        
             
        
        
        
Answer:
Probability that average height would be shorter than 63 inches = 0.30854 .
Step-by-step explanation:
We are given that the average height of 20-year-old American women is normally distributed with a mean of 64 inches and standard deviation of 4 inches.
Also, a random sample of 4 women from this population is taken and their average height is computed.
Let X bar = Average height 
The z score probability distribution for average height is given by;
                 Z =  ~ N(0,1)
 ~ N(0,1) 
where,  = population mean = 64 inches
 = population mean = 64 inches
             = standard deviation = 4 inches
 = standard deviation = 4 inches
            n = sample of women = 4 
So, Probability that average height would be shorter than 63 inches is given by = P(X bar < 63 inches) 
 P(X bar < 63) = P(  <
 <  ) = P(Z < -0.5) = 1 - P(Z <= 0.5)
 ) = P(Z < -0.5) = 1 - P(Z <= 0.5) 
                                                         = 1 - 0.69146 = 0.30854 
Hence, it is 30.85%  likely that average height would be shorter than 63 inches.
 
        
             
        
        
        
£110 as 45mins times 4 radiators divided by 60 mins =3 hours 
3 hours + 1 hour = 4 hours
4 hours times £20= £80
£80+£30=£110
        
             
        
        
        
Answer:
C
Step-by-step explanation:
Square root of 92 is 9.591663047
so round that to 9.59
 
        
             
        
        
        
180 divided by 5 = 36..................