Related Questions

The membership of two committees , football committee and cricket committee , must be drawn exclusively form a group of seven people . Farid, Gaffar , Helal , Iftekhar , Jalil , Kalam and Lalit. * Each of the seven people must serve on a committee. * No one can serve on both committees. * Farid cannot be on a committee with Gaffar or with Jalil. * Helal cannot serve on a committee with Iftekhar. If Helal serves on football committee, which of the following must be true?
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Piezoelectric is a material
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