What is the molarity of the HCL(aq) used in this titration?

In performing a titration, a student adds three drops of phenolphthalein to a flask containing 25.00 milliliters of HCL(aq). Using a buret, the student slowly adds 0.150 M NaOH(aq) to the flask until one drop causes the indicator to turn light pink. The student determines that a total volume of 20.20 milliliters of NaOH(aq) was used in this titration.