Help required to solve my physics homework problem

What happens to the reading in ammeter, If 20 ohm resistor is added in parallel with 100 ohm resistor?

Please explain

Pull out Ohms law and figure it out.

The equivalent resistance R_e of two resistors R_a and R_b in parallel is:

R_e = \frac {1}{\frac 1 {R_a} + \frac 1 {R_b}} = \frac {R_a R_b}{R_a+R_b}

Total resistance is always less than the smallest resistance, so the current in the meter will show more current. Who the heck is in school at this time of the year?

Could be making up or doubling up.

Summer school? Unless its First quarter electronics theory for trade school, Tech school or college. Which if thats the case...if they can't figure out how to do it....time to drop out now before they rack up a lot more bills that need paid. Everything builds on the basic theory. But that would be electronic theory and not physics.