I would would say 7.
Mom + Dad + daughter + daughter + daughter + daughter + plus one brother = 7
Since they are all sisters and it says each one has one brother I think that would mean 7. That's just my comprehension of the question, though I may 100% wrong.
I hope you might have understood.
Slot method aka permuations
6 slots
1st slot: 6 options
2nd slot: 5 options (1 went to first slot)
3rd slot: 4
4th slot:3
5th slot:2
6th slot:1
multiply
6*5*4*3*2*1=720
720 ways
Answer:
11. 135 mph
12. 40 Oz
13. 50 m
14. 2500
15. 240
i don't know 16
Step-by-step explanation:
11. 27 x 5= 135 mph
12. 24 : 6 x 10= 40 Oz
13. 1.5 : 3 x 100= 50 m
14. 40% = 1000
10% = 250 (1000 : 4 = 250)
100%= 2500 (250 x 10 = 2500)
15. 75% -> 25% = : 3
180 : 3 = 60
180 + 60 = 240