## Discussion Forum

Que. | Define the connective * for the Boolean variables X and Y as: X * Y = XY + X' Y'. Let Z = X * Y.
Consider the following expressions P, Q and R. P: X = Y⋆Z Q: Y = X⋆Z R: X⋆Y⋆Z=1 Which of the following is TRUE? |

a. | Only P and Q are valid |

b. | Only Q and R are valid |

c. | Only P and R are valid |

d. | All P, Q, R are valid |

Answer:All P, Q, R are valid |