The total current flowing through two parallel resistors (1.5 kΩ and 10 kΩ) is 20 mA. ?

Question

What is the current through the 10 kΩ resistor?

Answer 1

You need to learn how to do your own home work.  You will not have access to the internet during the test. Good luck, and work hard.

Answer 2

parallel resistance equivalent is 1.5*10/11,5 = 1.3k

Voltage is 20ma*1.3k = 26 volts

current thru 10k is 26/10 = 2.6ma

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Answer 3

Think about it logically.

That current runs through both resistors, but one has a much higher resistance.  Make a ratio of the two values and calculate it that way.

Another way to look at is to think about a river with two tributaries.  Ones has more resistance than the other, so the water runs faster through the one with the less resistance.