15X=12X+12
Subtract 12X
3X=12
X=4
Answer:D)The girls a re generally taller than the boys
Step-by-step explanation:
Answer: C
Step-by-step explanation:
the normal distribution is symmetric about its mean.
so answer c) must be true.
Answer:B
Step-by-step explanation: hopes this helps
Answer:

Step-by-step explanation:
Distance covered by the train in crossing the pole = 100 m.






- Hence, the speed of the train is 72 km/h