maths please check my answer

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paul orders a pizza. chef carl randomly chooses two different toppings to put on the pizza from the following:~ pepperoni, onion, sausage, mushrooms and anchovies.
if paul does not eat pizza with mushrooms, determine the probablity that paul will not eat the pizza that chef carl made.

is it 1/5????

  • maths please check my answer -

    There are 5!/(2!*3!) = 120/12 = 10 ways of picking two toppings from five. There are 4 two-topping combinations that do have mushrooms.

    Therefore the chances of there being mushrooms on the pizza are 2 in 5.

  • chemistry -

    Given that S is the central atom, draw a Lewis structure of OSF4 in which the formal charges of all atoms are

    help ?

  • chemistry -

    Given that S is the central atom, draw a Lewis structure of OSF4 in which the formal charges of all atoms are

    help ?

  • chemistry -

    Write a Lewis structure of OSF4 in which the formal charges of all atoms are zero

  • chemistry -

    single bonds on all S to F's, double bond on S to O. Then count valence electrons and add appropriately.

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