A 10 ml sample of HNO3 was diluted to a voulme of 100 ml then 25 ml of that diluted solution were needed to neutralize 50 ml of .60 M KOH what was the concentration of the original HNO3 soulution

A 10 ml sample of HNO3 was diluted to a voulme of 100 ml then 25 ml of that diluted solution were needed to neutralize 50 ml of .60 M KOH what was the concentration of the original HNO3 soulution