Complete Question 
The complete question is shown on the first uploaded image 
Answer:
The probability that there exist 60 or more defected children is 
Looking at the value for this probability we see that it is not so small to the point that the observation of this kind would be a rare occurrence 
Step-by-step explanation:
From the question we are told that 
         in every 1000 children a particular genetic defect occurs to 1
         The number of sample selected is 
The probability of observing the defect is mathematically evaluated as 
               
                  
The probability of not observing the defect is mathematically evaluated as 
             
                
                
The mean of this probability is mathematically represented as
                  
 Substituting values 
                 
                     
The standard deviation of this probability is mathematically represented as
    
Substituting values
       
      
      
  the probability of detecting   defects can be represented in as  normal distribution like
 defects can be represented in as  normal distribution like 
        
in standardizing the normal distribution the normal area used to approximate  is the right of 59.5 instead of 60 because  x= 60 is part of the observation
 is the right of 59.5 instead of 60 because  x= 60 is part of the observation 
 The z -score is obtained mathematically as
                 
                    
                   
The area to the left of z = 1.35 on the standardized normal distribution curve is 0.9099 obtained from the z-table shown z value to the left of the standardized normal curve
Note: We are looking for the area to the right i.e 60 or more 
   The total area under the curve is 1 
So 
     
                      
                     
                   