Answer: 63 children and 88 adults swam at the public pool that​ day.
Step-by-step explanation:
Let x = Number of children
y= Number of adults
As per given , we have
x+y=151 Â Â Â Â Â Â (i)
1.50x+2y=270.50 Â Â Â Â Â (ii)
Multiply 2 on both sides of (i)
2x+2y = 302 Â Â Â Â Â (iii)
Eliminate (ii) from (iii)
0.5x=31.5
⇒ x = 63  [Divide both sides by 0.5]
Put value of x in (i) , we get
63+y= 151
⇒ y= 151-63 =88
Hence, 63 children and 88 adults swam at the public pool that​ day.