Answer:
The value of e is -1 and f is -2.
Step-by-step explanation:
The steps are :













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Answer:
x = 3
Step-by-step explanation:
Answer:
The total number of ways in which the 5 people can sit is: 5!=120: 5!=120
Let us assume that person d and e are sitting together and are taken as a single entity, the number of ways in which 4 people can sit is: 4!=24: 4!=24
The number of ways in which d and e are not sitting together: 1120−24=96.