Karachi: Pakistan women whitewashed Zimbabwe women in the T-20 series, beating the guests in the last match by 133 runs in Karachi last night.According to Radio Pakistan, batting first, Pakistan scored 223 runs for the loss of four wickets in the allotted twenty overs. In reply, Zimbabwe could score only 90 runs before being all out in 17.1 overs.Meanwhile, Pakistan captain Fatima Sana made a new record for the fastest half-century in women's T20Is. She scored her fifty in just 15 balls.