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$M_{ o }=50$ seconds
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→Find the values of the following :
$(1)$ ${ }^{8} \mathbf{P}_{3}$
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→$(1)$ ${ }^{8} \mathbf{P}_{3}$
$(2)$ ${ }^{60} P_{2}$
$(3)$ ${ }^{7} \mathbf{P}_{6}$
$(4)$ ${ }^{5} \mathbf{P}_{5}$
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