Torah lesson at mixed meeting- Women can stay?

Igros Moshe (YD II:109) Question  An secular organization  has a mixed meeting of men and women. A rule they made was that every meeting someone needs to give a Torah lesson. Can the women remain for the lesson Answer  The rule is a good idea. As to whether the women can remain for the Torah lesson, it is not worse than the secular topics they talk about at the meeting. While it seems accepted in America to have mixed meetings and I don’t know the reason for the leniency. Nevertheless there is no reason why the woman should leave during the Torah lesson since they also need to know Torah. However if Mincha is prayed at the meeting  than the woman need to leave the room