Jake, Lena, Fred, John and Inna need to drive home from a corporate reception in an SUV that can seat 7 people. If only Inna or Jake can drive, how many seat allocations are possible?
Choose the correct option
A) 30
B) 42
C) 120
D) 360
E) 720
5 people ,7 seats, only 2 can drive   if inna is in one seat remaining, 4 people can be arranged in 4p4 i.e 4! =24 ways   since any one can drive total ways = 24 *2= 
<gadget id="calculator">24 *2</gadget>
<output>48</output>
48 ways   4 seats can be chosen out of remaining 6 seats in 6c4 ways= 6!/(4!*2!)= 15 ways     48*15= 
<gadget id="calculator">  48*15</gadget>
<output>720</output>
720   ANSW720R:720
<result>E</result>
Jake, Lena, Fred, John and Inna need to drive home from a corporate reception in an SUV that can seat 7 people. If only Inna or Jake can drive, how many seat allocations are possible?