Answer:
0.82
Explanation:
We are given that
Total number of parties=n=6
The probability that each party will order drinks with their meal,q=0.75
The probability that party will not order drink with their meal=p=1-0.75=0.25
We have to find the probability that at least one party will not order drinks with their meal
Binomial probability distribution

Using the formula


Using formula;





Hence, the probability that at least one party will not order drinks=0.82