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     EduGorilla 
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    The number of connections C that can be made through a switchboard, to which T telephones are connected, is given by the formula C = T (T – 1)/2. How many more connections are possible with 30 telephones than with 20 telephones?

    Options :-

    1. 435
    2. 245
    3. 190
    4. 45
    5. 10
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